telkom is *****

I have had endless problems with telkom to resolve my internet billing problem .The issue ac cured when i phone telkom to solve my slow speed problem .i have a 10 meg line and been reaching speeds well under 3 meg sometimes going as low as 200kb per second this problem has been lasting since the beginning of my contract with telkom that has been active for almost two years.After multiple complaints to telkom i phoned again and spoke to a lady and explained to her i am tired now of keeping to complain the lady told me i have been on a 9meg line all this time and she will change my line to 10meg...i phoned telkom to demand a refund as they have been in breach of contract putting me on wrong line giving me not even close to to internet speeds i am paying for ..after again phoning about 6 times its not resolved yet my line speeds are still under 4 meg and and internet just switches of ..I feel telkom should refund me for my two years and fix my line .They are taking my money but does not do effort the help their client