Disgusted Service: Hisense

I have been getting the utmost disgusting Service from Hisense. Purchased a phone on 2/11/2019. Battery started giving problems February/March. Due to lockdown I've been going through hell but after several emails and fights with them I eventually got the Battery. In June/July I received a new battery delivered to me. Beginning of September battery started swelling, phone getting hot and usage is on 72% than it just switched off. I am not getting any support or for that matter CONSTRUCTIVE assistance from Any staff. I've sent Several emails but to no avail. I am having to buy airtime all the time and still no one seems to assist. I've asked to speak to Senior Management and that I've been denied. Thus far I've dealt with Prosper, Roche, Zandile, Karabo, ***nor and the list goes on. I've asked for a refund or for that matter a New phone because I don't believe in fixing phones. I use the phone for Job applications and my son uses it for research if and when he needs to. I've even left messages since 9.33am this morning but till now NO response. I am livid with your service Hisense.