Bad service at Jet Phuthaditjhaba with bad attitude from workers

I bought a phone from jet on the 10th of November 2017 than my father bought the same phone later on the 11th of December 2017. Both phones gave us problems and one was taken back to the store for repairs on the 13th of December 2017 then later the other one on the 22nd of January 2018. I have been going to the store countlessly to enquire about the phones but the response I get is "If you have not yet received a call then your phone is not back from repairs" and that was during end of January. I went twice this month and they made copies of my documents claiming they will do a follow up and gave me a date to come back on, and I did come back but the workers attitudes that day was really bad it was as if I was anoying them they couldn't even give me a response about the follow up there was nothing , I then asked for the manager who then promissed to call me the next day to come pick new phones. In deed I got a call from them it was on a Saturday i then went there only to find that the statement is no longer the one of getting new phones on behalf of the ones that are not yet back, the workers and the manager are now denying what they said and refused to hear anything from me and told me to go and come back when i have received a call. My patience is running out now because it's past 2 and a half months now that iv been running for help and nothing is happening im even thinking of going to the police and speak out because im not geting the help i need.