Sadly, this is the same fate for every +EV bettor on sportsbook. I’m not aware about the refund policy of Betpanda but I hope they reconsider the refund of your deposit if you don’t have any suspicious activity aside from +EV bettor.

I assume you do arbitrage betting right? As @mahdirakib pointed out about they refund policy, it’s very hard to make a case on a refund if the ToS stated that before you deposit.