Regus review: Deposit refund

We are due to receive a refund of over £4,500 from Regus as we terminated our lease at the end of the contract. The lease ended on 31st March and as per their terms and conditions we should have received our deposit refund today (30 days from the end of the lease). I requested the refund well in advance on their portal as we had horrendous delays in getting a previous deposit back and wanted to ensure all went smoothly. Since the end of the lease I have raised tickets via the online help centre and sent emails to the community team and local management who all tell me they have no idea when I will receive my refund. I have asked them to escalate, to speak with finance but they are either incapable of doing so or just don't want to. We have made every payment due to them on time and in good faith, despite experiencing the most horrendous customer service, been misled and lied to and them causing actual harm to our business with their shoddy practices.