No after sales service

I ordered and received the rain 5g on 29 April 2020. I logged a query on the same date abour no connectivity. I followed up with several more mails but the only response I get is ticket nrs. I even explained I need to cancel my 2 4g sims and use the 5g only but currently I am paying for all 3 the sims without proper connection on the 4gs and NO connection on the 5g. I am inable to reach them on telephone or email.