TERRIBLE CUSTOMER SERVICE

I purchase 2 Samsung S4 phones, cell numbers *** & ***. on 1 Dec at Virgin Mobile shop at Clearwater where I wanted to do a sim swap, I was advised the contract is cancelled without my knowledge. No option to amend/correct this was given. I called the HEAD OFFICE spoke to Zinninzi *** - very abrupt agent, telling me that you dont buy sim cards not to use and it is their policy to cancel if not used in 90 days, she wants to tell me how to use the sim cards I purchase. Again no option offered to resolve. Where and when did Virgin mobile advise me or get my permission to cancel the contract and prior to cancelling, convert to prepaid. I paid the phones up and should still receive the TOP UP 100 as per contract. Now I also loose out on upgrade next year. I insist on a solution to this as you do not have the right to make decisions on stuff that I paid for without my knowledge! I want 2 sim cards reinstated with the continuation of my contract so that I can be eligile for upgrade next year. THIS IS TOTALLY UNACCEPTABLE. IF I DID NOT ENQUIRE, NO ONE WOULD HAVE TOLD ME. IS THIS THE TYPE OF PRODUCTS YOU SELL TO CLIENTS...TOTALLY UNSATISFIED WITH THIS SERVICE