Nashua Mobile
3 weeks and still no information

I have not received any information from Nathaniel who said he will get hold of me after speaking and emailing him.
I want to cancel my contract as I am not receiving any of the service I have been paying for.
Why does it take longer than 3 weeks for a claim.
All I want is feedback but got none so please cancel my contract with immediate effect I will take my business elsewhere. I refuse to pay for something I do not receive