Been paying for 10Mbps line yet i am getting 3

Been paying for 10Mbps line yet i am getting 3 and i think i have made more than 10 complains and evey technician who comes here and tests my line says its impossible for be to even get 4Mbps. So honestly why do i have to keep paying for 10 yet the speed even drops to 1 sometimes... Past complains were not responded too with any serious responses.. I have complained here more than 4 times and all i get is we will contact you to get this resolved but NO ONE CALLS YOU BACK FROM TELKOM. So honestly i am tired of this ******* and i think its time i take some action because i can't just wait bye and be ******. A few months ago you sent me an email saying you will replace my faulty adsl with smart LTE and someone would call me from Telkom to get this sorted but its been months and noone called. I went to a telkom store and there noone knew what i was talking about.. So please can you get this mess sorted out and i think i deserve a refund for all this ******* or maybe i should take legal action.