Disgusting level of service!!!!

4 months ago have received a phone call to upgrade my line from R1350 a for 50 MB month to R1199 for a 100 MB, the person told me it will be done automatically and it will be cheaper, since than Internet got worse and when I went to Cell C they told me nothing has been done and my account in areas as I am paying less as I ve been told from Cell C, within 3 days can't get hold of this people keep switching you to the most useless operators that at the end just tell you OHHHH, just send us an email and we will respond!!!!The most useless people I had to deal with!!!