Grave Number

Good Day

I have been trying to get help from people operating guys at the Avalon cemetery and they are not assisting me I'm currently looking for the grave number of my grand mother who was laid to rest in 2013 November I even went there on Saturday and they told me they cant assist me at the gate as the was no one in the office and when I call they always tell me that I need to come there as they cannot assist me on the phone and I'm working I'm only looking for the grave number for Grand mother that's all please assist as this is my last hope.