Low Download Speeds

just today, Monday, 20 April 2020, I again phoned Telkom ( Ref no ***9 ) about my low download speeds. I was migrated last year Octobet by Telkom from the ADSL 4mb/s to the Smartbroadband LTE 10mb/s. Since I had this product I never got close to 10mb/s and this closest I got to it was 9mb/s. Before I phoned Telkom today I got up to 2mb/s after I phoned I got 7mb/s. As I'm posting this review now, I'm getting 1,9mb/s. I feel that Telkom can take this product and shove it up where the sun don't shine. Must I phone them everytime when I'm not getting the preferred download speeds? What will be my airtime bill be because I'm phoning them from a vodacom number? I'm paying R800 a month for a product that is non-existent. I am fed up with the constant issue I have with Telkom and their product that is not working like its suppose to be working.