Hi Loubylou,
Have you cancelled all the direct debits at your old bank? If not, you need to do so.
Yes, you will start getting calls and letters, usually they start a few days after you have missed a payment.
A DMP is just an informal agreement, and although they will get their money back, they want it now, not in a few years time. Some of them will freeze interest and charges, but not all.
I was in a DMP for 18 months before my IVA, and once it was set up, I had few phone calls and was lucky that all of my creditors froze interest and charges. My situation was reviewed every six months.
You should send any letters you get to your DMP company and either don't answer your phone, or just tell them that you are arranging DMP and just put the phone down.
Sharing from experiences of dealing with debt
The greatness of a man is not in how much wealth he acquires, but in his integrity and his ability to affect those around him positively.
Bob Marley.
http://kallis3.blogs.iva.co.uk