IMEI Number not being picked up by warranty

I wanted to find out why the IMEI number on my phone is not being picked up on the Samsung warranty system? I had an issue with the phone not charging and eventually took it in to Samsung Customer Care Centre on 14th Avenue. They mentioned i would have to have the USB charging port replaced for R 900.00, of which i paid, as i needed my phone back and needed it to charge. This was in January 2015. I need to somehow be reimbursed for this amount, as my phone to my knowledge is under warranty, as all Samsung phones hold a 2 year warranty, do they not? Please advise. My IMEI number is ***. I received this phone late 2013 from a reputable company's head office in Midrand.