BAD SERVICE - JOB NO ***5 PHONE NO ***

On 14 of April I took my Galaxy S3 to the branch for repair work to be done. The phone don't want to charge anymore. Everything else on the phone is working and I don't have any other problems. The phone is not even a year old. It fell about 2 months after I received it and the screen was cracked, but that has no effect on the working of the phone. When I took it in I showed the lady the crack and said I am aware of it, but that is not my concern/complain, the problem is it just suddenly stop charging. I also said and it was stipulated on the paper she gave me back that if there is any questions or problems they must phone me. After 5 weeks (19/5/2015) I received a message that the phone is back from repairs (it was send to Menlyn). I went to collect the same evening, when I got home I immediately plug the phone into the charger, but nothing happened. The phone is still not charging. When returning to the branch they said nothing was done to the phone as the screen is cracked and therefor the phone has no warranty. This is unacceptable the cracked screen has nothing to do with the charging of the phone they could have phone me or even quote me for repairs.