Really bad horrible signal

If I could give a 0 rating I would. I have a tablet device with a mtn Sim and a cellphone contract with MTN. What a MISTAKE!! I literally NEVER have signal anywhere. Luckily I have wifi at home otherwise I might aswell switch my phone off or not have one. I should have gone for vodacom my partner NEVER struggles with signal. I live in Stellenbosch so it's not like I'm in the middle of nowhere. This is absolutely horrid. They used to be a good company.