how can i recover my password after my phone is been reset now i cant sign in it tells me someone is using that nick name and email

my phone is been reset complatly and now i cant not sign in to GAME CENTER when i do it tells me theirs someone with the name same name (me)

i purches to many coins i dont want to start as a new member and to top it all i forgot my password PLEASE CAN SOMEONE HELP ME!😟