Unhapppy, Terrible experience from Telkom, they don't care at all

I have purchased a phone on contract at Telkom a year ago, i tried to port my vodacom number to this telkom number last year October, till today i have been told the port is still stuck in the system, i cannot view my balances, i cannot buy data or do anything because of this and now i am told my telkom number does not exist on my account as well as my proof of purchase- i am so frustrated and i have been calling telkom everyday to assist me on this, spoke to managers and technicians i still have no help. Now my phone's screen is dead and i want to bring my phone in for repairs with insurance- but i cant because i dnt have the documentation and on the system my number doesnt exist. I am stuck with a broken phone, going back and forth and nobody could assist me, but Telkom continues to bill me R 1000 a month for my device and insurance. I am so unhappy and i want to cancel this contract i am really frustrated, its been 4 months now. Can someone help me please!