Poor service and network connectivity

I recently joined rain and received my SIM on 25/03/2021 and i connected it on my device on 26/03/2021. Immediately I experienced problems with SIM not being recognised even after the APN settings were captured as per the email instruction. I called the helpdesk on numerous occasions and was advised the Network Dept will contact me in 2 to 24hrs. No one contacted me the whole day, i called them and was advised to wait until the SLA time expires. When that time had expired I was told they have a backlog and it will 1 to 4 days for them to resolve. When I asked for a Manager by the name of Simphiwe, i was told his busy on a call and cant attend to me and the Call Centre Agent by the name of Charlotte refused to give me her surname and the managers surname when i wanted to escalate the matter further.