Vodacom fibe is Bull****

Good day, I would like to inform all that Vodacom Fibre is a load of Bull****!!! I have had a fibre contract with them for 3 & half years and not once have I received the line speed that I pay for!! I have reported this problem over and over again, to which they respond by sending out technicians over and over again...... My router has been changed, my cable has been changed, my power supply has been changed, you name it it's been changed🤦 I was on a 20/10 mbp line and they could not sort the fact that we never got 20 mb download, now they have increased my line to a 50/20 mbp line with an increase of R100 , from R599 per month to R699 without my consent! There are customers paying R399 for a 50/20 mbp line which I am paying R699 for and the answer I was given when questioning this, is that my infrastructure does not allow them to provide me with a R399 contact ( what infrastructure?they can't even provide me with with what I am paying them for)And I am still not evan receiving 20mb download speed!!! But its the first debit order that goes through every month!! I am paying for something they cannot deliver and have failed to rectify in 3 & half years, this is unacceptable!!!