Worst ever service from Vodacom upgrade callcentre

I tried to upgrade online with Vodacom, but after I entered the otp that I receive via sms, it only said that there is an error on the system and that I must try again later. This happened for a week! My closest Vodashop is 60km away... Also during this time, I tried upgrading telephonically with the call centre. But somehow I never received the otp's that the call centre sent. They tried blaming it on my phone, but while waiting for these sms's I received sms's from other people. Eventually someone at the call centre decided to send it via e-mail. This I did receive and could finally upgrade. I received the device a day later... and it was faulty. Again they tried blaming my simcard. The call centre said it would be picked up in 48 hours. 48 hours later no one had contacted me. I phoned again and they said that it takes 48 hours for the case to be allocated to an agent and then up to 8 days to be picked up. The first supervisor (Bhekumuzi Ntuli) never opened the case and the day after I spoke to the 2nd Ntembela Mzazi the phone was picked up. And now 3 day later I'm still waiting for the upgrade to be cancelled. This is unacceptable! I've lodged complaints and they don't respond