Mudslingers Pool and Patio

i hired mudslingers to install a new vinyl pool liner with liner lock first they burnt a hole in the liner with my pool light and had to repair the hole as they installed the light then they glued all of my pluming and had to come back and install a union because they sealed it and the pipes could not be removed to close the pool and pump. then my flood light burnt out and due to their installation, they had stripped the bolt heads and they can not be removed. and the liner lock that i paid extra for has come out in at least 50% of the liner lock strip. i called them on the plumbing and they sent a manager out he fixed it when i called about the light being stripped they said someone would come out but they did not and now i called about the liner lock and they told me it was my problem.
i am very dissatisfied and i am hoping that they will change their mind and come repair the mistakes they made after all i paid over $4500.00 to have this work done right to date it is not right