Made purchase online but no sim

I purchased the Id deal for 4gb data with unlimited calls and text for £6 a month through uswitch.

I received a thank you email saying my direct debit has been set up and a following email about the monthly bills but I have not revived my physical sim card nor an email saying my sim has been dispatched.

I am trying to contact id through the live chat and always get 0 response, I am very disappointed in customer service and I can't even cancel my contract because I can't make an account since I don't have an Id number since I didn't get a sim!