warrently is useless!!!

i had booked my phone into the work shop on the 4th of may and it had only been picked up on the 23rd may. by that time my warrently had ended and they had still collected my phone without informing me that it had expired, after me calling the contact center numerous times to ask them, they than collected my phone and delivered it to the wrong customer. they had informed me off this when i had contacted them to follow up in June and to update my contact details. which the consultant never updated. on the 24th of june more than 6 weeks after i had booked my phone in i had called in to follow up and than they advise me that i need to pay +- R2000 to fix my phone as it did not reach the service department before the warrently expired. my question is why did they not inform me of this when i had called in numerous time ??? i had finally receive my device back not fixed but damaged even more!!!!!!!!!!!!!!!! the back cover is now not sitting correctly on my device and is damaged! my back camera is not clear !!! and they had also wiped my phone clean! i Also had to buy 172 for a service fee to asses the phone!!! but why did they damage my decive further and than return it ??? now i need to pay for someone elses incompetence???????? I will take this further if i have to as this is not acceptable and every one you speak to there is trying to make excuses as to how this is my fault!!! Clear and transparent !! CPA !!!