Please help me

Writing this hoping that i would be contacted by you. On the 6th April I paid for off peak hours LTE data (R250). Since then to date i have been unable to make use of it. Speeds recorded have been between 0.01mbps and 0.07mpbs. Since 6 April i have sent 5 emails requesting help and received only 1 response which was not useful. I have had chat conversations with several consultants and again nobody could help. The conversations end abruptly and I am left stranded and having to start a new chat.