Why is the signal for Cell C RSA so pathetic?

Iv been with Cell C for years now and I havr never had a problem with signal or Internet untill I upgraded and now on a data plan wich im paying alot for every month and I can barley search something on Google. <br> im for every seeing a notification stating there is no RSA Cell C network available? how can that be I live in Portelizebeth and a 2min walk away from Cell C! this is pathetic service and iv made multiple complaint at Cell C out lets and nothing changes. im wasting my money because im not getting the services iv been promised and can barely even call 80% of the time it custs off because of no signal. Im defantly changing to another network supplier if this isn't resolved soon! <br> I battled to even post this because of the poor Internet service!