I want my data and sim functioning

I have two mobile phones with telkom on contract of which I receive my data on both and both phones are P20 lites, now the problem I have been experiencing is that since October last year I am not able to access data on both my phones mind you these phones are dual sim so when I switch my Sims using telkom as my default data sim as I am receiving the data from telkom there is no signal I get the error "emergency calls only" now only last month on my secondary phone was I able to access data but not on my main. Now I have been to telkom direct at gateway and done a swim swap as some of the Telkom consultants have advised me to and also received help from their technical support to no help.. Now just last week I logged a case about this hoping telkom would be in contact with me but still none has contacted me, yet Telkom is quick to send people to collections for missed payments but FAIL TO DELIVER