YET AGAIN I AM FORCED TO PAY FOR PHONE REPAIRS

I can't for the life of me understand why I stay with Vodacom!!! 2 years ago I was quoted R2000 for a brand new BLACKBERRY 9720 - upgrades for my twins for Christmas and what a disappointment that was when the phone was not charging.....The charging block was faulty from the beginning and you accused me of dropping the phone... A BRAND NEW GIFT!!! now today I sit again with the same problem. Only difference is that my Sony gave me no problems until now... 1 and half years later.....WHY DO YOU OFFER WARRANTY???? I have had warranties on these phones for over 2 years and NEVER GET TO USE IT but when I do .... YOU EXPECT ME TO PAY FOR A HANDSET I AM ALREADY PAYING YOU FOR!!!!! I have 4 contracts with you and every time the Lord shows me that it's not worth having these contracts with you. I am so disgusted at how cellular companies ***** customers. MY UPGRADE IS DUE IN JUNE 2016 AGAIN and I am seriously debating continuing with you.