Bought a cellphone cash which is registered as a payjoy phone and isn't working

Disgusting service if there was a -10 option I would've chosen that. Bought a cell phone in cash on 16th January realized the phone isn't working apps even such as Bluetooth isn't working. A pop up message comes up everytime stating that due to non payment some apps might be blocked. I contacted the customer care who advised me to take it back. I did so from the 1st encounter they weren't keen so help after they learnt it's a cellphone issue. I told the gentleman Nashif who had a attitude what I'm coming for he wasn't interested after he learnt I'm not instore to purchase and gave me over to another lady. (They're very keen on assisting if you're coming to purchase) I waited over an hour for them to call customer care since they made no secret they didn't believe me that customer care advised me to bring the phone back. I then left but told the lady I'm taking my kids to lunch and will be back, returned after almost 2 hours to find out she too hasn't called customer service in all that time. I asked for the manager who doesn't deserve the title as she too didn't help and or get back to me. The manager told me customer care is closed as it was a Sunday, I need that to be confirmed as it doesn't make sense. I asked that they keep the phone along with receipt as its of no use to me they advised I would have to wait to be contacted. Since then another lady is now involved as I personally contacted customer care who seems to be the ONLY people trying to help me & I'd like to mention that ONLY when customer care agents are listening in on the call I felt heard. I have since received an E-mail stating that Phoneyam is busy working on the messages I keep receiving no mention of the device that isn't working and keeps freezing. Ackerman's Promenade you don't deserve a rating all round imagine 4 staff members including the manager and I'm being treated like a *****. The device was bought for work purposes well it's not working and y'all are not willing to assist. I want my money back END OF STORY!! I have full proof of purchase and the messages I have sent emails to confirm same. Ackermans do better I'm expecting to be contacted and reimbursed.