just send a ticket in, it usually take about 10-12 days to get it resolved depending on how busy they are. also when transferring/buying/selling cars make sure not to do too many in one day, this will generate the system to do an auto-banned
it really depends on what car you are using. some cars i use stock tires but launching is going to be different(depends if you drop launch) and also be aware that its going to be harder to drive because you will spin out most of the time
they usually want to fix the issue then hand out the gift afterwards. i would rather the game be fixed first so everyone would be happy then the gift later and make everyone more happier!