I am owed £3,000, but no one would contact me

I submitted 2 requests for a withdrawal, both for £1500, so £3000 in total. A couple of days after my withdrawal request I got banned from the website. Every time I go www.pa­nth­erc­asi­no.com it automatically goes to https:­//w­ww.p­an­the­rca­sin­o.c­om/­ban­ned.html with a message on the page saying "We are sorry, but we are unable to provide you with access to our site.
This may be because you are in a location which does not allow online gaming, or your account may have been made inactive.
Please accept our apologies, and if you have any questions, please email support."

I have sent various emails, all with no response, to try and find out what is going on. They were sent to suppor­t@p­ant­her­cas­ino.com and market­ing­@pa­nth­erc­asi­no.com as these were the only 2 I could find online as there is nothing listed on the banned page I get directed to.

I have also phoned them on 0845 299 3715 but never got an answer so after trying a few times, at different times of the day, I left a voice message with my mobile number asking them to call me back or at least reply to my emails.

I have heard nothing at all from them so am very suspicious as to whether they have gone bust....
Please can you help??

All of this has been going on for about 3 - 4 weeks. I have been constantly checking my spam and deleted folders but there has been nothing from them.

Regards
Paul