2 months Discovery Insure has not fixed my roof,bad service providers

2months and counting Discovery has not fixed my roof after a hail storm , they have sent *********** service providers to attend to the roof repairs,the company only attend to the repairs 7 weeks later ,and still did not repair my roof, my is still leaking and further damages from discoyvery service provider.Now they appointed a 2nd roofing service provider who confirms the bad job of the 1st service provider and now discovery refuses to pay the 2nd service provider in full to repair the roof and the damages from the 1st service provider,now they are looking for excuses to not repair my roof.