Neotel Service Cancellation

I signed up with Neotel for the neoflex package 10GB. I am extremely dissatisfied with the network. I am experiencing very bad seeds.<br> <br> The technician came to even install an external antenna. the seeds improved very little but still very slow. I done a speedtest and i am receiving between 0.25 and 0.40. this is extremely slow.<br> <br> I want to cancel immediately. I will lodge a complain with the consumer body and also get an affidavit and a hearing why i wish to cancel. Neotel said i cannot cancel. How can i use a service that is useless and not working. I await a reply and confirmation of cancellation. or atleast give me LTE package instead.