Google My Business 429 error - quota exceeded

Hi everybody,
I’ve been using Google My Business module to manage my business profiles on several google accounts for the past few months. We have one main google account with the approved API (we filled the form as per intructions), then we set that main account as an owner for google cloud projects on other google accounts. It worked fine so far.
Recently, I tried to connect to a business profile on yet another google account. I created the project on Google Cloud and added our main account (the API one) as an owner. However, when I try to run the module, I get 429 error - quota exceeded.
It is triggered once I try to chose the account name in the module:

[429] Quota exceeded for quota metric ‘Requests’ and limit ‘Requests per minute’ of service ‘mybusinessaccountmanagement.googleapis.com’ for consumer ‘project_number:xxxxx’.

I contacted the make support and they said the problem is with my google cloud project and that I should apply for a higher quota. I don’t doubt they’re right, but I filled the form a week ago and got no response.

Have anybody here had a similar problem? Do I have to connect my credit card with Google Cloud to get a higher quota? Why didn’t I have the same problem when connecting my other accounts?

Have a great day everyone,
Gogler