Juniper Bank Credit Card reviews and complaints

I have had a Juniper bank ( part of Barclays Bank) credit card that was due to expire in 2012. They just canceled my card for lack of use, without warning and now won't let me use any of my Earned Rewards points. I stopped using the card when it took them considerably longer to post payments, and I was getting late notices. Every other bank and person I paid (on line) credited my payment in days, Juniper took over a week. I have tired to deal with them in writing (ignored) email (told to write them) and by phone (many phone calls.

Do not use this bank! If you have one of their cards, CANCEL it NOW!

I opted out from my Juniper card over the phone. Unfortunately, they think that I needed to also send a letter. I now have a closed account and they want me to pay a 29.99% interest rate when I followed all their instructions. I have never made a late payment and I now have a jacked up interest rate from 12.24% to 29.99%. Do not use Juniper if this is how they treat a "valued" customer. I now have to fax a letter to the company and possibly contact an attorney over something that a company should be doing in the hopes of being reputable.