Spotless External Phone sent to Vodacom Damage Iphone - Refuse to Repair

Phone was send in for repairs and the phone was spotless externally and after a month Vodacom cannot fix the phone now they say: " UNIT HAS ADHESIVE OUT SIDE AS IF UNIT WAS OPENED, SAFETY ***** IS MISSING. POSSIBLE UNAUTHORIZED REPAIR" See attached Job Cards (three) nothing was stated anywhere that the phone was damage on the outside. You are the worst company ever! I cannot describe the absolute frustration and anger I feel toward this company. I spend thousands a year on my contracts with Vodacom and I never fail to pay my accounts...not even once. And this is how you treat your loyal customers?? Please do me a favor and go and check my accounts. FIX MY PHONE!!!!!!