Ignoring me for 5 days, not responding to any communication

I made 3 withdrawals on Sunday and Monday morning totaling £1500. Monday morning I received an email asking for 3 forms of I.D. I emailed these back a couple of hours later and never heard anything. Rang the next day and was told to wait 24-72 hours. 72 hours came and went and on Wednesday was told to wait an extra day. Thursday I still had no response so I rang again. This time someone said they would email the security department for me and someone would get straight back to me. Obviously no-one has got back to me. I am on day 5 from sending my ID back and I haven't even been told it was received let alone verified. I have sent numerous emails and this morning have tried to speak to someone on the phone, I have called 13 times and have not been able to speak to anyone, it is just on hold or engaged. The one time someone did pick up they cancelled the call. This company is relatively new and seems to heavily advertise that they have 24/7 call centers etc and good customer service. I have never been treated like this anywhere, they are literally ignoring me. All the while my £1500 sits unprocessed. Terrible company.