There's an old saying — I'm not sure where it came from — that ”silence is consent.”

So I always make a point of giving constructive feedback — not just attacking and calling them stupid RIP offs — whenever I encounter a situation that's really annoying me, and I tried to frame it in such a way that it will leave no doubt that I'm saying ” your policy is going to lose you money, because I'm not the only customer who's going to walk away.”

These venues don't care about actual feedback but they do care about their bottom lines so if the feedback is always wrapped around damage to their bottom line I feel like it is more likely to be ”heard.”

Your example with Dunelm is also an effective angle if they think they're going to get in trouble legally things tend to change rather fast.

Again not trying to take credit, but some years back my wife started rattling an attorney e-commerce giant eBay because of a practice they had of arbitrarily holding incoming payments from buyers for up to three weeks, which led to a major class action lawsuit, as a result of which PayPal stop being and integrated part of eBay commerce.

Regardless, it often feels like paddling upstream against a current that moves you backwards ever so slightly faster than you're capable of paddling.

=^..^=