Bad customer service

Last month my camera was not working,called momentum as iv insured my phone with them,they choose platinums repairs to fix my phone,to my suprise my phone was returned to me not fixed but my screen changed (wich was not damaged) and the screen used is not a iPhone original screen,I called and complain my phone was collected and the camera fixed,than my worst nightmare began,since my ***** was tempered with my phone freez,does not work the way it use to,currently my speaker does not work,can’t hear people whenthey call or when I call.i did send s complain to momentum but no one got back to me.i pay monthly for my phone to be insure but they giving me bad customer service,momentum choose this company (platinum repairs) to fix my phone but it’s mow damaged and I’m still paying monthly installments for it,Momentum I want my phone replaced as I did not choose this bogus company that ruined my phone and I’m insured with you guys.you have made my life hell,I have my life cover,home content insurance with you guys but u you failing me.i hate the way I’m being treated I don’t know maybe it’s become I’m black?