Hi marka and welcome to the forum
Who do you bank with? If HSBC or First Direct they have a policy of not banking anyone who is subject to ongoing IVA proceedings.
Also if you have gone overdrawn whilst in an IVA, then that is deemed to be taking unauthorised credit - another reason why your bank may have taken the stance it has.
You should have little problem in obtaining banking facilities elsewhere - this forum has many postings on this very subject.
Regards, Melanie Giles, Insolvency Practitioner for over 20 years.
For further details contact me at
http://www.melaniegiles.com and view my IVA blog at:
http://melaniegiles.blogs.iva.co.uk