Seeing delay retrying requests beyond rate limit maximum

Hello,

We are progressing on the synchronization of the Analytics part, over the last 30 days, for accounts. For this, as seen together, we use the /reports routes in GET then PUT.

We are facing several problems. The limit is not 200 calls per minute for these routes but 200 + a 1 second delay between each. We need 2 requests: GET then PUT. That is 4 seconds for 2 requests for an analysis request. First limit. Second limit, in order to collect information from the last 30 days, or even more, we need a significant delay: around 20 hours. However, it seems that our "massive" requests, by internal choice, trigger this error:

Could not resolve host: api2.frontapp.com.

Are we, suddenly, considered as "spammers" and therefore blocked after a number of requests? In this case how should we proceed if we want to refine our filters and "consume" requests.

Thanks in advance.