Vodacom Fibre not worth the hassle

I am really struggling. I have a vodacom fibre line at my house. It is R580 uncapped a month. Last month they went and took more that R2000 from my account. I have phoned now 4 times and every time they say it will be resolved and has been put thru to someone that can arrange the payment back to me. This is not being done and my account so far is over R2000 for this month also. They are charging me for an temporary LTE that they gave me to use until the fibre line is up. And yes,i paid for the LTE when i had it, the installer took it with him and from then i have been paying the full Fibre amount. Vodacom just can't seem to sort this. They keep saying they will send me the reference number, but they never do. Every time since November last year when i speak to someone trying to cell me vodacom fibre that i all ready have,I tell them how bad my connection is and i have to restart my router now and then because it gets so slow. Every time they say the will report it, yet nothing ever happens?