Telkom LTe drops like brick and no assistance.

I have been using Yelkom LTE for more tgan 2 years with little or no issues. Over the past week I have been facing difficulty to connect to the network. I phoned customer care and informed them that my router shows I pick up 4G. In the past my onyernet speed was about 7Mbs, BUT during the day end evening it drops to 0.25Mps. When enquiring they only inform me they will send me an sms with the settings for my router. Even after explaining that it reaches a speed of 9Mps early mornong, then drops to below 1Mps all they say is "We will log a case for you and tge technician will contact you." still waiting for a call, vit the only call is telkom sales, tryig to have me get another contract. If this is service, then please no. One lady tried her best to assist, bit to no avail. When informing them thatt early morning that I have strong Internet, but during the day and eveing I have next to nothing I dont get assistance. I ahve always referred friend to Telkom for good deals, but for the past week not gettong any joy, O am wonderong of I should not move on...