KIA Motors review: warranty claim

I have been servicing my car at the same service centre for the past 5 years (puchong Kia service centre), and I have been complaining about my AC problem and power steering problem since the last 2 servicing I went through. They have tried to fix it but it just seems like it cannot be fixed. so I wanted to claim and my warranty and they told me they would submit to warranty department 2 months ago when I was still under warranty, but when I called them back 1 month later they said they have forgotten. what kind of service is that?! and my warranty was ending. so after I complained again, they said they will try to do calibration for my power steering. and it was fixed for 2 weeks and the problem came back again right after my warranty was over. If they didn't 'forget' to submit my warranty during that 1 month, I would have been able to claim my warranty for my power steering in time. please explain to me regarding this 'coincidence'. and now that I want to claim my warranty, they are telling me that HQ is rejecting my application. I complained from when theres warranty until now warranty is over, but now that warranty is over, it's my problem that my power steering is still fixed? someone please explain to me how Kia works and get back to me ASAP! you can contact me through my email
my email : [protected]@hotmail.com