Poor reviews and ratings

[Algorhythm_jT]

I have an interesting challenge for a new client. Basically, they collect payment from gym users whose monthly subscription payment has failed, and they charge the gym user a fee and not the gym. Their clients love them for this, but the end consumer hates them and as a consequence, every review or ratings site from Google Reviews to Trustpilot is universally filled with angry consumers who didn't read the Ts and Cs of their gym membership.

Understandable, but it also means the client can't have a presence on any social channel as they simply become a gripe board for disgruntled consumers.

My question is, how are the poor reviews impacting on rankings and domain authority and should I treat this like any other client in terms of fixing crawl issues and seeking quality backlinks or am I always going to be pushing water uphill?

Cheers gang!