Business Products Company

So I have an iPhone that recently went boot looping, I took it to the nearest Apple Store down in Palm Beach Gardens, FL where they said they were going to fix itThey gave me a loner (iPhone 6) and send the phone for evaluation when they received my phone back they email me saying it was ready for pick upCame to look for my phone and it results they didn’t fix it stating that it has an unauthorized modificationThis phone is a lease from Sprint (where they don’t do repairs) and was never taken to any other place cause it had never failedNow it results nobody, neither Apple or Sprint wants to deal with it