Waiting forever for vehicle registration refund

On the 18th January 2016, I submitted invoices to Donovan to refund vehicle registration as agreed. He responded to the email saying that it will make arrangements. 8 days (26/01/2016) later I wrote follow up email to find out what was holding the whole process, he everything was handed and he will do follow ups and plead to him since it affect our budget On the 27th he wanted proof of banking details for the account provided and he given go ahead to use the one on their system. On the 1st of February follow up email was sent to him and he said he was doing follow with head office. On the 05th of February 2016 he was asked what seemed to be difficult with refund since he has all relevant documents and he said all payments are done at head office and he was asked to provide contact details for the person dealing with refunds as he said but up to date no payment or response from Donovan since my last email on 09th of February 2016.<br> <br> Can some explain or direct me to the relevant person dealing with this issues please.