MoneyTap — No response for emails

Hi i have applied for credit line through moneytap as it was pre approved with rbl bank till i submit the documents there were a proper response later i received my rbl moneytap credit card from rbl bank.

When i want to use the credit line because of medical emergency i need to contact to moneytap as they don't have call line process i have emailed regarding my issue with there app as i cannot able to login on there app almost i wrote 15 emails they did not even bothered to reply back.