Poor Service Rain Mobile Network

I did a sim swap after my son card stopped working, I then got a confirmation that my son would be delivered Friday 16 October 2020, at 2pm the same day I got a text saying the sim card was active I put my son card in my modem the signal is red, I change it and put it on my iphone it says "emergency calls only" The rain customer support centre when u call to complain they tell u about "APN " settings which I did already.. They have poor service and the network is just ******* It's been a full week after paying for that stupid internet and still I'm not connected