FNB Connect - refusing to refund me

I am actually very disappointed in FNB. I have been a client for a while with FNB and never have I had an issue with them, even told friends and family of what a great bank they are until today.

I did this FNB Connect sim thing, got the sim end of October and until today never used it so I decided I want to cancel and request my money back, as it is a service that was never used. Now as a client you would think that they will assist you no questions asked, I am told it is out of the cooling off period I am not able to get my R735.00 (2 months debits) refunded to me! Please note this is a service I have not used at all, they debited me a few days after I got the sim R367.50 and then again this morning, so for a service I have not used I would think me as the client would be attended to, as R735.00 is not pocket change. However I get the repetitive message on FNB chat stating we are unable to refund you, as you are out of the cooling off period >> FOR SOMETHING I HAVE NOT USED AT ALL! How can I pay R735.00 for nothing?! All I want is my money back, that's it. I am very disappointed in FNB - you should feel safe at the bank you bank with especially when it comes to your money but in this case I beg to differ!