CANT GET A SIM CARD REPLACEMENT FROM RAIN SERVICE PROVIDER

I have been struggling with Rain internet provider for the past month of December just to get a replacement simcard because my simcard for some or other reason became faulty and will not work in my 5g router anymore.... ive done all an every trouble shooting i can do and still i cant use my data now at all. I have been a loyal customer since July of 2019. Its really not fair that i need to struggle like this just to get a replacement on my sim card. ive gone thru probably 6 agents of rain that i am use to seeing there names when i chat to them an none of them could help me fix my problem i have...... Asking for a simcard replacement is not much to ask for being a loyal customer ....... Maybe the Ombudsman should hear about this and see if they can atleast help me as Rain has no customer service