Shocking treatment by upgrade department

I posted the below complaint in another category on hello Peter - Cell C connect and have received no response. My cell c contract was up for renewal at the end of April. Due to the lack of decent upgrade deals on my iPhone I decided to not pursue an upgrade but rather wait for a better one or shop around. I found a good deal with mtn and planned to switch over when me contract expired. So when a call centre agent called at the beginning of April I explained that situation and he said that if I e-mail him the deal, Cell C will match it. Great I thought, saves me the hassle of having to change over. I sent the e-mail but needless to say I never got a reply. A few weeks later another agent calls about an upgrade and I again explain the situation, and again she says to send an e-mail (they both smsed me these e-mail addresses), but this e-mail does not go through, stating that the server did not accept request to connect? Never had that before! Now today another woman phoned (and I wish I got her name), same story but she tries to argue why mtn's deal is not better (when it clearly is) and then she has the gall to pretend that she can't hear me saying hello hello and puts down the phone. We she was speaking to me on my landline and could hear me fine up until that point! Absolutely disgusting!! I will certainly be cancelling my contract at the end of the month.