Increase security measures how does one upgrade without fingerprints

I found out last month that my account was upgraded without my knowledge thru a ********* in a branch in Grahamstown ive never been there in my life, am based in Midrand. I managed to track the store manager and she logged a ***** query for me ref.. *** ive been making follow ups no tangible response ive been given. Am so sick and tired of this service i want my account back to what it was and also credited as i cannot be charged for a phone i havent ******. I need my data back 250 mb and 100 gb. Also make sure that no one except me can be able to upgrade my contract you need to beef up security in these shops this is a huge inconvenience to my business. I need my account sorted and the data i was paying back i need to continue with my business . You all can sort out your ***** things later am really ****ed off as this is not my problem please call me at ***.