MTN RIPPING ME OFF

I TOOK MY PHONE FOR REPAIRS ON THE 5TH MAY and STILL HAVEN'T RECEIVED IT, I WANT MY MONEY BACK FOR THE PAST 3 MONTHS OF BEING DEBITED WITHOUT A PHONE AS IT IS A CONTRACT. IM NOT GETTING ANY JOY

PLEASE RE-IMBURSE MY DEBIT ORDERS FROM END OF MAY....