Double charge - Case ***

On 22/12/2015 at 11h34am, travelling north, I stopped at the N1 Kranskop toll gate to pay the toll as I was not aware that this toll plaza was now accepting etags. My wife told me afterwards that my etag did beep and the boom did go up but as I was busy paying the booth attendant I did not see this happen. I was not given a receipt by the booth attendant and after paying the R38 I drove on. The result is that I paid twice at this toll (etag and cash). When I returned I logged a call to get the R38 refunded. Their first reply asked for the receipt. I rep**** telling them that I was not given a receipt by the booth attendant and attached a signed declaration stating that I paid the R38 cash. Their subsequent replies have been the same despite me telling them every time that their booth attendant did not give me a receipt and asking for contact details of a senior manager to speak to. After four such replies (on advice from a lawyer) I attached an affidavit saying that I paid the R38 cash. The fifth reply received this morning is again asking for a receipt. Does Sanral really not accept affidavits? Is the strategy to be as difficult as possible and hope the customer goes away?