No service - please cancel

My mom's contract expired last September. She's been with MTN (via Nashua Mobile) for about 10 years and now that she needs to upgrade, no one responds. She's tried calling but has to wait hours with yoour call center. She's emailed and no response. I have submitted online upgrade request and still NOT A WORD from you guys.<br> Is this how you treat long term clients??<br> <br> Due to your LACK OF SERVICE, she would like to CANCEL her contract and have her number migrated to pre-paid to change service providers.