I was charged $350.97 on January 29 for “concurrency x80” due to an accidental, brief adjustment of the concurrent calls limit caused by UI lag. The limit was immediately reverted back to 20.
I’m also seeing an upcoming invoice of $698.51, which appears related to the same unintended change. Since this was not intentional and was corrected right away, I’m requesting:
A refund of the $350.97 charge
Review and removal/adjustment of the upcoming $698.51 invoice
I understand you’re experiencing billing issues related to an accidental concurrency limit adjustment. Based on the available documentation, concurrency in Retell AI refers to the number of simultaneous active voice calls that can be handled by your system at any given moment(1). Pay-As-You-Go users are allocated a default quota of 20 concurrent calls(1).
For billing and refund requests related to accidental charges, you’ll need to contact Retell AI’s support team directly. The documentation indicates you should reach out to support@retellai.com for issues requiring longer calls or exceptions(1), and this same channel would be appropriate for billing disputes.
You can also get assistance through these support channels:
I was charged $1380.86 on Feb 06 2026 for “concurrency x179” due to an accidental, brief adjustment of the concurrent calls limit caused by UI lag. The limit was immediately reverted back to 20.
I’m also seeing an invoice of $1380.86 three times, which appears related to the same unintended change. Since this was not intentional and was corrected right away, I’m requesting:
Please cancel the invoices for the $1380.86 for dated Feb 6 2026
I understand you’re experiencing billing issues related to an accidental concurrency limit adjustment from 20 to 179 concurrent calls(1). This situation is similar to other reported cases where UI lag caused unintended concurrency changes(2)(3)(4).
Based on the available information, when you increase concurrency, Retell AI prorates the charge(3). For example, if your billing cycle starts on the 1st of the month and you purchase additional concurrency on the 15th, you will be charged only for the remaining days in the cycle(3).
Since you’ve already submitted a support ticket, that’s the correct first step(2)(5). The Retell AI support team will need to review your account and billing history to resolve duplicate or incorrect charges(2)(5).
For billing and refund requests related to accidental charges, you should contact:
When the support team reviews your case, they can investigate your concurrency usage logs and help correct the invoices if needed(4). In similar cases, the team has been able to add credits or refunds after reviewing the situation(3).
@Omar_Ashraf
I was charged $1380.86 on Feb 06 2026 for “concurrency x179” due to an accidental, brief adjustment of the concurrent calls limit caused by UI lag. The limit was immediately reverted back to 20.
I’m also seeing an invoice of $1380.86 three times, which appears related to the same unintended change. Since this was not intentional and was corrected right away, I’m requesting:
Please cancel the invoices for the $1380.86 for dated Feb 6 2026
my email address is satish2352test@gmail.com on which this invoices has been generated can you please check once
Thanks in advance
I understand you’re experiencing billing issues related to an accidental concurrency limit adjustment from 20 to 179, resulting in charges of $1380.86 that appear multiple times on invoices dated February 6, 2026.
For billing and refund requests related to accidental charges, you should contact Retell AI’s support team directly at support@retellai.com(1). When reaching out, include:
The specific date of the charges (February 6, 2026)
