Note 9 pro

Bought a note 9s for Christmas everything was going great with the phone, until the middle of January it started rebooting itself so I contacted the service centre they then told me to get collected from their Courier so they could assess what was wrong with the phone. It first of all took almost a week to collect it then once they had it I never got feedback unless i asked for it. It was with the service centre for almost 7 days then suddenly we get a message saying it is coming back via the courier. We got it back yesterday with a repair slip saying we needed to go back to takealot to ask for a replacement or credit. No one communicated that with us in the first place they should of told us that with out wasting time. I then logged a return with takealot to find the phone did not come back with the sim card tray so now things are been delayed even more. Please can someone assist with getting it replaced me I beg you soonest.