Bad, bad, bad - don't try and call or receive calls

I subscribed to Rain's One plan of a 5G router and two 4G simcards. I ported my current number to one of the Rain simcards and since then am not able to make or receive phone calls. I have unsuccessfully tried to get this issue resolved. I have called 081 *** and explained my issue, I am then transferred to the voice department, that just never answers the phone. I am made to hold on for 20+ minutes. I have even tried the Facebook route to try and get assistance, with no success. This is most frustrating as I need to be reachable and be able to make calls, but Rain has proved to have no customer service and is not at all concerned that a customer is not able to use their service. I will not recommend this product and will be cancelling the entire subscription.