ASK HN: Any advice on bad GoTo-support?

I'm quite desperate so I want to ask, whether you might have some advice or similar experiences with bad customer-support at GoTo? We implemented the GoToWebinar-APIs in may 2022. Our customers were quite happy, however we are facing an API-request limit of 500 calls per day. Thus, having an event with 1500 participants takes several days to create using the API.

There are ways to lift the API-Client to production-mode by calling the support. And there is the problem: GoTo support is refusing or is just unable to help. Several mails and conversations later we still have no solution. Even worse, the support takes two to four weeks to answer requests and is seemingly unwilling to help- I even got asked, whether I want to downgrade my account (???).

I'm actually thinking about ditching the GoTo-integration and move to competitors like Zoom. Even if this will result in an investment of work. Also our clients would not be happy to move to another provider due to their habits. Finally, I don't know whether the customer-support is on the same, inacceptable level.

Do you have made similar experiences with GoTo or other providers like Zoom?