Disgusting network speeds at ridiculous costs with no client services

For the most of my contract duration with MTN for the past few months I've been receiving download speeds on my router between 560 bps and 200 kbps. I've mailed the customer care address as per their website and after about 3 months I've received no update what so ever. Moreover when you try to call 137, 135, 083 135 or 136 you are lead down a rabbit hole of incompetence since you try to speak with a consultant which in any menu option leads you to either the credit department or the legal claims department which as you'd guess is only available from 8 to 5 so they can't even put you through to the customer care call centre. If I phone the help line through the day I usually have to make between 7 to 15 calls before I can be properly assisted by customer care, and they would reset my line on their end which results in an average download speed of 4 mbps for about 3 days before the problem reoccurs. Clearly not the "bozza network" they claim to be and consultants are only the "MTN Champions" of incompetence.