Nashua Mobile
Not receiving statements and invoices

I haven't received statements and invoices since March, i have phoned several times, i have e-mailed, i have asked in person. what do i have to do to ensure i get monthly invoices and statements?
your service is shocking, your service have deteriorated over the last couple of years. pathetic
i will advise everyone not to use Nashua Mobile, i've had it with the shocking service over the last couple of months. it's almost a comedy of errors