Inferior repairs/parts

I recently had my screen repaired at Wefix Cresta and while fitting a cover on to the Ipad the screen cracked. I immediately approached the store and they told me that they cannot replace the screen under the given warranty as it constitutes as physical damage which is not covered in their T&Cs. I asked for a copy of the T&Cs and accordingly it states negligence not physical damage. When asked how fitting a cover constitutes as negligence they referred me to the area manager. After several calls, most unanswered, the area manager told me the store manager would relay the outcome, a 10% dicount on another repair.

This is unacceptable, there is a warranty in place but WeFix are not willing to uphold it. They would rather imply that due to them not witnessing the event that the damage was caused by other means. As a company there should be accountability but it seems it's easier to pass the buck on to the customer.