Extremely unhappy with Telkom's *********** employees

We have had our ADSL line with Telkom for 8 years. We upgraded to LTE in November but we were promised a speed of 150mbs, which is not the case. Now that we want to cancel they are saying that there is a cancellation fee and the lady, Norma, who over promised has blocked my husband's number, and she never told us that we have to pay for the old LTE router that we received. We are extremely unhappy and it is a pitty because we never had a day's trouble with Telkom and our ADSL line until now.