Vodacom Brooklyn or Potchefstroom break my phone

Good day,I booked my phone into the Vodacom shop at Brooklyn mall on the 13/11/2015 for a faulty heart rate sensor, this fault was an out of box fault since brand new, its 8 months old when booking in due to time constraints being without phone.On 24th Nov I received a message from repair centre saying my screen was replaced.i immediately called them to enquire as I did not send my phone in for a screen repair.I enquired,They did not know anything about my job logged as a heart rate sensor fault,neither did they fix that problem.They insisted it was a broken phone.i Called the Brooklyn store to report problem,They checked job card and agreed that phone was not brought in broken,i then received an sms saying my phone is ready for collection.I called and lodged my complain several times,spoke to MrTohann and MJ Given Phenye,i requested them to have there manager Mr Craig call me on resolving the matter.i cannot accept a phone back that was broken in there hands,im unsure if it was dropped or it was driven over,i looked after my phone as I usually do without even a scratch when it was booked in,i require Brooklyn to provide me with a new replacement phone.or pay me out.No feedback rec