No response to eBucks problem

I tried to make a purchase online on Tuesday 9 June. The OTP pin did not come through. I reported it and after being on the phone for half an hour with customer care, did they remove my pin option and said I would be able to do the transaction. I still couldn't. My account was then blocked and I was unable to do the transaction. This all happened around 3pm. At about 6:30pm I got the OTP number twice but now it was too late. I sent an email to [Email Removed] again yesterday morning 10 June. No response! I have since then sent another 3 emails.....no response. I am unable to use my eBucks to make a payment and the product I wanted to buy, will not be on special for a long time. Nobody has rep**** to my complaint and this is totally unacceptable. I also cannot sit on the phone for hours in my office to sort out problems that should have been sorted out the first time.