Poor service!!!

I got a call from a person at mondo ,took out a contract of a router and a phone then when speaking to the sales person I was told that I can cancel my contract within 7 days of window period and I did just that because I didn't want the router anymore..Dsv people came to collect ..I gave in the sim card and router . At first I had trouble figuring out what sim card to put in where then I was directed and I did just that then all of a sudden my phone sim card is not working (which means they canceled my phone sim card instead of router) and probably the sim cards where not in correct places I kept calling then they gave me a run around ,even sending me to call telkom and all and then I call telkom then telkom tells me to sort it out with mondo For weeks now I'm with a sim card that doesn't work!

I recieved a email of a bill of more than 2000 ,of which I dont understand ,then I went to the nearest telkom store then I'm told that it's the cancelation fee "I cancelled late" but I cancelled in the duration of the "window period "

Poor poor service and dishonesty!!!!!