Upgraded to an incorrect contract plan(Fixed LTE in error)

I was upgraded to an incorrect plan(Fixed LTE) instead of anytime data as a result, I am now unable to make/receive calls or connect to the internet unless if I am connected to WiFi and I am now being told that it would take up to 4 business days to resolve the issue(to reinstate my old contract). This has impacted me drastically emotionally and financially as I was expecting deliveries and I needed to make business calls but unfortunately, as I can't make phone calls /receive calls anymore since i am now on Fixed LTE plan