Getting error in subcription and billing?

Done the same in incognito mode. deleted all the cookies. Tried the transaction will various savings and current account via net banking as well as debit card and credit card still the same error. No one for support. Chat support says they will raise ticket and it gets closed without any correspondence and without resolution of issue. There is no other way of communication neither there is any other way of payment. I am willing to pay the entire amount for the year upfront, i am ready to pay via any mode available but there is no back up plan. I do not understand how can there be no backup plan to resume service for those who are willing to pay.