Disgusting service and unqualified providers

I have been trying since September with Auto and General regarding a concealed pipe leak. According to the contractors I brought onsite it is a pinhole leak coming from the supply pipe in my shower.

Auto and General sent two plumbing companies out who did a dye test and said the problem is my shower grouting. Auto and General therefore refused the quote.

I sent a dispute and attached reports from two contractors who both found it to be a concealed pipe and after weeks I now get an email saying we’ve tried to contact you but have been unsuccessful and your claim is denied as it’s a grouting problem.

The last plumbing company even stated if it’s a pinhole they cannot detect it as they don’t have the equipment.

I have even opened up the exterior or my wall in the hopes that Auto and General would send someone to come and see but nothing besides denied.

The grouting hairline cracks are above shoulder height but according to the plumbers sent by Auto and General this is the problem!?!

What more must I the customer do to prove it’s a concealed pipe leak!

It’s disgusting that they send plumbers out who confirm they don’t have the correct equipment to detect the leak and then deny your claim, shame on you Auto and General, shame!

I have spent months trying to resolve this and now I head to the ombudsman with my photos and reports.