Thorp Subaru terrible service

I took a Subaru Outback for 60 000 km service (this is a big service). There was no indication where to park when I arrived, no one around and no one at reception. Mohammed said he would contact me during the day to let me know progress but I never received any calls to give progress or to let me know when to collect my vehicle. I was charged me for a new petrol filter - parts and labour - but they never fitted it (they left it in my boot). Mohammed told me they could only fit it if I had less than half a tank of petrol. They never told me this before the service, so I assume a lot of people just end up having to bring their car in twice for a service. I'm just sorry I didn't insist that they reprint my invoice deducting these items, as I had a feeling it was going to be a nightmare getting it fitted after I had already paid. Mohammed said I must let him know when my petrol is low and he would send a technician to my workplace to fit the filter. I brought my car in 19 July. Today is 31 August. I have received not a single phone call from Subaru / Mohammed. There was no one available to speak to me last time and I was told that service manager Neville would contact me as soon as he was available but no one did. I have let Mohammed know twice that my petrol tank is low and he has promised to send a guy out the following day. Both times no one came and there was no call from Mohammed to let me know what was happening. I was charged R7 300 for the service.