Mondo Mobile with never use them again very disappointed

Extremely disappointed after doing a upgrade in 7 of December 2022 more than a month and half waiting for my cell phone did not receive any device no follow up message and when I made numerous calls spent around R400 on airtime to call them,I was never given proper information ,so I speak to a manager numerous times was always told that the is a process which I followed and still up till date no manager has got back to me after numerous calls I called on Tuesday the 18 of January 2023 and now they do not have the device so they canceled my upgrade without informing me after waiting patiently,every other time I called in there was a stock availability problem absolutely disappointed do not know why the cell phone networks actually use this company they've got no customer care after speak to numerous consultants and keep on dropping the call on me which is absolutely pathetic regarding customer services.