I too have been reflecting on what options are open to the OP, in terms of deterring the TOCs from heavy-handedness. I suspect the answer is policy related (political, in other words) so perhaps the OP will want to consider writing to their MP with a specific request that it is raised with the Secretary of State. This has the merit of the MP perhaps finding similar cases from the same location.
A few years ago I was involved, at a tangent, with someone who was falsely accused of shoplifting. He had been stopped leaving a well known supermarket and accused of stealing a box of chocolates.
He loudly (and correctly) explained it had been purchased elsewhere but he was frogmarched past his friends and neighbours to the back office past the entire store on a busy Saturday. He continued to protest his innocence, and the police were called, despite the fact that the product didn't scan on the supermarket's system - because they didn't sell that particular item. This was in the days when the police would turn up for shoplifting. They didn't do much but supervised the shop asking questions, taking his personal details, and retaining the item. The next day a police officer turned up at his house, returning the chocolates - that officer knew nothing of the case or even why he had to return the box. No explanation, no apology.
Well, they got the wrong guy, he was an affluent businessman, the only thing that mattered to him was his reputation, so on Monday morning he was in his solicitor's office, and soon he moved legal proceedings on the supermarket for false allegations, so potentially leading to a private prosecution for perverting the course of justice. He named the supermarket manager in these proceedings. Obviously as soon as HQ legal's team were aware they tried to negotiate a settlement, initially for £500! But it ended up a much bigger sum - I think £20,000 - with about £5k being legal costs. The supermarket's biggest concern was about broadcasting this settlement, but they couldn't stop the businessman discussing it with their MP.