API Rate limit

Hi Team,

Recently, we are facing a rate limit issue with Lodgify v2 APIs, even though we are making one call only for one customer. We have around 120 customers who are using lodgify. The API that we are using right now is this https://api.lodgify.com/v2/reservations/bookings

As per our logs, we are only able to make 25 API calls only and for the rest of the calls we are getting 429 error messages.
As per documentation limit should be 750 API calls per minute.

After some time our IPs Address are blocked.
These are some IP address that are blocked as per us:
44.194.48.208
54.205.188.222
44.209.18.27
34.206.69.133

Can we get any help to understand why this is happening and is there anything we can improve in our system while making these API calls?

Thanks in advance!