Advances are becoming harrassment

I have received numerous calls, sms's and similar unsolicited offers following the expiration of my contract, which I decided to simply let run on a month to month basis. (2 calls today, 2 sms's in the last week).<br> <br> Everytime I ask not to be called again in this regard, but this does not offer any solution. I am at the point now where I am considering cancelling my contract just to avoid this nuisance. To anyone considering Cell C - don't....