Struggling to retrieve house keys left in the car

I am writing this email as a desperate attempt to get assistance from AVIS. I rented, through our company, a Mercedes registration no DV 73 VB GP from the OR Tambo branch on the 30 September 2015. I returned the car on the 03 October 2015, dropped it at the Pretoria branch (Central). <br> <br> I mistakenly left my house keys in the car with a gate and garage remote (one green remote with four buttons). I came back on Sunday and they were closed however the security guard (night shift gate security) told me that he saw the remote and he even described (it was a four button with one damaged button ) which was very strange but demonstrated that he saw the keys. Unfortunately AVIS branch was closed.<br> <br> On Monday, I went back to try and retrieve the remote, I spoke to a person called Joseph, who initially told all the people who work with lost and found are not available, secondly he could not find it. He went around looking for it and could not find. Though I told him that my remote was green, he was looking for a grey remote, eventually I corrected him and he said he could not find it. He phoned the person who was driving the car and the person promised to give him feedback at 18h30 but he was