REQUESTED REFUND REPEATEDLY

My company (Johannesburg Paint Supplies) placed an order and paid COD for R4,672.01 in May 15.<br> On 12/06/2015 we did a cheque deposit for R1,710.00 in error to this company. We only picked up this error about 2 weeks ago. I personally phoned Isadore (sales department) requesting a refund on 02/07/2015 and he advised me it will be done by 06/07/2015.<br> However this was not done and when I phoned him again he stated that the director is abroad and he will e-mail him for authority to do a refund.<br> I have not had any luck over the past week after numerous phone calls and trying to get anyone else in the company to assist. <br> My name is Hain and my no. is ***