Bad service,taking no responsibility & not caring

Highly discuses with Vodacom & more so Vodacom Fourways Mall. Took LG G4 on contract. I had phone for a week & realised a problem with battery. I took my phone back to Vodacom Fourways Mall. I had returned it within 7 day period. the staff member assisting me then took the phone & we signed the relevant paper work more importantly the block ticked for no external damage where i signed. The staff member assisting me told me it will take 3 days in repairs. A week later i had not heard anything from them. i had to be inconvenienced &go back to the store for them to tell me oh my phone had drop damage &could not be sent in. For a week they chose not to tell me. secondly they accused me of dropping my phone while in their care, they refuse to take responsibility even though i signed a paper saying no damage. it has now been over 3 weeks later, little to no communication & empty promises of delivering my new phone to me. I will have to now pay for a phone for a month that i have not been using, i still have no phone, wasted airtime phoning them, wasted petrol & time, emotionally distressed & high blood pressure from having to fight with them. And no response from customer care either!!