Dirty tradings

Today I went to Jet store at Lakeside Mall Benoni. I was assisted my lady of the name Nomsa. And as she concluded with my transaction requested my information as I was purchasing on account. I asked her thrice why she needed my information,I was rudely answered by her colleague to say updating details. And to my surprise I was handed a receipt which I had to sign and asked again because I saw Club and a clause at the bottom of the receipt,this time Nomsa answered to say that I'm signing for notifications when there are promotions and I said NO,because the receipt clearly stated something else. I then asked her to cancel it and refused to sign. But as I write this I don't know if it will be cancelled. Very disappointing because one can't help but think of all the senior citizens who don't know how to read but are being ******* into membership and contracts under false pretence. After this I'm going to settle my account and close this account. This isn't how we should be treated especially under these economic circumstances