bank dispute

A debit went off on my account, my account might of been hacked as it was an overseas institution of which I have never subscribed or even heard of, I called Discovery was advised to wait until payment is reflecting on my account even though funds were debited thereafter I was advised to await an email to confirm my details when I called another agent told me that no email was to be sent it would be sent to the ***** department and I should wait the 90days to receive my funds. I asked how can I assist even by calling the merchant to follow up and speed up the process but nothing. I called back was advised it never went to the ***** department but is still with the dispute department after 3 weeks its just there not being processed or anything. I have never experienced this before & ive had disputes with other banks before but after this experiencing and reading the comments im not happy, to date I have not received no communication, no follow up & no refund