No reply or correspondence

I serviced my car at Imperial Volvo Bloemfontein a while back. The service cost me R23 000. I did not get a call to hear if everything were OK after the service. The car is idling unevenly after the service and the engine stalled a few times (It is a automatic car). I did write a mail 2 times to Volvo's customer care Mail adress. I did get automated replies to tell me they would respond within 24h of receiving the mail. I still did not hear anything from them. This has now been more than a month, whithout any reply, so I would really not recommend any Volvo in South Africa to anyone due to the following: 1. Because of the poor service we received from Imperial Volvo in Bloemfontein. 2. Because of absolutely no reply to any of my previous complaints to the customer relations E-mail address. 3. Because of the cost to keep the car running. There is no option for a oil-change service if you did not drive the 15000 km within a year. We had to pay for a 160000 km service, while the car now only has 98000 km on the clock. 4. Because the build of the cars is not of high standard. This Volvo is the 1st car that I owned, that had a door lock stop working. (my 40 year old Mercedes still have all the central locking locks working). The safety-belt release button stopped working. The airbag needs an urgent service. The turbo broke, (that were fortunately while the car were still quite new and under the "service plan" so it were a free fix. I were interested in buying a new XC90 for a replacement, but Volvo is now at the bottom of my list.