Poor delivery of service - EXTREME

I currently use a Sony Xperia Z3 Compact handset. I have been using this handset for less than a year. I get extremely good battery life as I never leave my phone to charge overnight or anything that might compromise the battery at all. Last week the battery started running down very quickly (within 4 hours). I took the handset to the "Vodacom Repairs: Vodacentre" in Bloemfontein (3 Collins Rd, Westdene). At first, the lady at the desk refused to ask a technician to just check whether all the settings are optimally set. She insisted I book the phone in for repairs. I was sent to a different desk for this. I was sent back and forth between two desks and "helped" by 4 different people in one day - each time having to explain what is wrong with the handset - even to a point where a Vodacom emplyee asked me if I think the phone must be booked in for repairs. At one point the manager of the centre came out of her office (there were friends from other departments having coffee there since their electricity was off) and asked if she can assist me. I told/asked her to please take control of the situation as I have been in the centre for over 40 min already and still not an inch further in progress to have my phone fixed. Eventually we booked it in for repairs. (This all happened on Thursday 19/10/2017. On Monday (around 11h00) I got an sms from the centre to inform me that my phone was ready for collection. Upon my arrival at 14h30 they were "still busy" with the software on my phone. I had to wait for 15 min once again. The charge on the repair was R466,20 (I have the tax invoice with me). I heard the manager comment that this was for a "battery reset". I was advised to charge the phone for 6 hours. I did exactly this, and today it is doing exactly the same as before it went in - in other words, I have had to deal with the most *********** and unprofessional service that I have ever experienced at Vodacom, I have had to pay for a "new battery" which apparently has only been "reset" and are still sitting with the same problem as last week. This is completely unacceptable and reflects poorly on the company as a whole! It is unfortunate that on this website one has to pick a star rating of any kind, as one star is too much for what I have experienced at this "repair centre"!