Failure to reimburse in good time

A month after accidentally overpaying my Edgars account - I am still bating to be reimbursed. This despite having sent in all the required documentation by 30/01 - numerous emails and phone calls to their Financial call centre, an extremely unhelpful gentleman in Customer services who felt his responsubiluty lay with giving me the number for... the Financial call centre again. Attempts to escalate resulted in a promised call back from a man called Brian. No call back yesterday. He did say that my documents had been received on 23/02 and reimbur*****t would be possibly in 7-14 days. Really, 3 weeks to move paperwork around? 2 months to get reimbursed for a simple error? Really terrible customer service Edgars, honestly - could you care any less?