I was secretly charged 368 dollars by Airbnb for n...

I was secretly charged 368 dollars by Airbnb for no reason. I was not notified of the charge - the only reason I found out was by looking at my bank statement. After alerting airbnb of the issue, they ignored the issue for about a week. Finally after multiple requests someone got back to me saying they issued a refund , but upon checking my bank account , the refund was only for 330. I still have not received a full refund and was never told how this could have happened in the first place. This company is ridiculous and shady