Client IPs that are home users flagged and blocked by Amazon AWS WAF HostingProviderIPList how to de-list

I work for an ISP who provide business and home user broadband connectivity. Recently various clients have had issues with services stopping from different providers (British Gas Hive and Disney+ being most common) and upon investigation the clients IPs are being blocked due to HostingProviderIPList not allowing them. The providers have both stated that they cannot resolve and it needs to be solved by Amazon AWS WAF (I suspect they can put in bypass but clearly the process isn't defined for support teams).

I therefore need to know how to submit a change of purpose request to Amazon AWS WAF for these IP blocks and can confirm our WHOIS and IP management does have the correct/validated entries set to reflect home users. We do not have an Amazon AWS account (as the ISP) or access to the support teams as we do not utilise these functions, so it appears we do not have the ability to contact Amazon AWS support. What is the correct procedure for contacting Amazon AWS from an ISP point of view. (I tried to raise with Amazon AWS peering contact but as suspected they do not have access/the correct team to deal with this)

(note - this was sent with my personal Amazon AWS account not associated with the ISP I work for)