RAIN CALL CENTRE LINE CUTS OFF

Since last week Saturday the Rain 5G Router I have, stopped working and the x2 sim cards ric'd [ONE] deals been deactivated. No issues with debit payments going off. I phoned on four seperate occasions this past week to get assistance for a 5G Router replacement and the x2 sim cards reactivated. Each customer service phone call cuts off after 2 mins, I requested the customer service agent to return my call to my cellphone, no call back. I urgently need assistance and reliant on wifi for my online part time studies in the evening. I understand if the call Centre agents are loaded with enquires, the least that can be done are issues to be resolved with customers via Email if the customer Centre phone line connection is bad.