No invoices sent for 2 months after 4 phone calls

I have changed servers as Nashua Mobile went out of business. Since then I have been unable to receive an account in order to pay. After I was disconnected I had to phone through to change the email address to see if they had the correct one. This was done twice. I still have not received an invoice! The last phone call I made was today where I requested an invoice and the response was that they are having problems with their email. We live on a farm, with little connection and even we cant use that as an excuse after 2 months!<br> <br> I have never received such poor service from a company. Is there any way that I can change to another company who is competent.