Helpline nonexistent

I paid the fee and after a week I received a mail that unfortunately there is blocker on my account. I first need to renew a licence for another car, if I don't respond in a week they'll charge me for the service. I have now tried to follow-up multiple times by mail and phone over the last 3 weeks and have received no feedback. They have not refunded me licence fee or provided any response on how to proceed.