I have accessed the third-party payment Qonversion, which has been uploaded to testflight, and some phenomena such as purchase failure or purchase waiting time out occurred when the customer used it The Qonversion developer replied that there were too many requests for this account and needed to change the account, is that right Do you need to change your account? How do you return the account? I want to know how testflight can correct the sandbox account instead of its own account

I have accessed the third-party payment Qonversion, which has been uploaded to testflight, and some phenomena such as purchase failure or purchase waiting time out occurred when the customer used it ​The Qonversion developer replied that there were too many requests for this account and needed to change the account, is that right ​Do you need to change your account? How do you return the account? I want to know how testflight can correct the sandbox account instead of its own account