Pathetic Service

I have app**** for 2 contract phones early January from Cell C, the sales person was Smangele Jele, her service was ok and professional, she informed me that their SLA was 7 working days or 7 days, the first phone (blackberry 9320) I got it just before the 20th of the month, however the sim card is not working, they have already started billing me though, because they are so quick in doing that, the second phone (Blackberry Z3) was out of stock, after a week of waiting I then decided to get a phone that was available, I changed to Samsung A5, and it was then delivered on the 30/01/2015 after a long wait for a phone, but to my surprise, an A5 phone uses a nano-sim but they decided to be clever and smart and sent me a micro-sim card, I took the liberty of going to the cell c store in menlyn, atleast the person I spoke to knew how to do his job, he gave me a nano-sim card, but could't do a sim swap because he would have to charge me, he gave me the sim, today on Monday, I called them for a sim swap and was advised that it will take 2-4 hours to activate the sim, 4 hours passed and because I know how bad the service is, I took the liberty of calling again, nothing is done.