Nissan - Ineffective Quick Fix "Solutions"

I bought an Xtrail two and a half years ago. In January this year I took my car to the dealership I bought it from to help me turn on the alarm. After leaving it with them it came to our attention that Nissans don't actually have alarms - despite me asking the salesman about it at the time of the purchase. It is unacceptable that in Crime-ridden South Africa no Nissans have alarms. Had I known this at the time of my purchase I would not have bought it. The dealership has offered to pay half of the cost of fitting an alarm, which will void my warranty. The leather on the driver's seat is also cracking after a mere 25 000 km and although they have offered to send it in to an upholsterer to re-pad the seat it's not going to solve the problem of the damaged leather. It feels like they are only interested in offering quick fix ineffective "solutions" to hush me and to get rid of me. Things seem to bounce between head office and the dealership without terribly much progress. This has been frustrating to no end.