Personally, I would ignore it. If you do call, tell them you have an IVA meeting on Friday so you won't be making a payment to them
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
There is nothing they need to speak to you about in regard to the IVA -- I imagine they are chasing missed payments or after a settlement. I would ignore it.
My opinions are merely that .. opinions based on experience. Always seek professional advice.
IVA Completed 23rd July 2013 .... C.C. 10th January 2014
Ignore it and if your phone allows you to block their number, do it. Send them straight to voicemail! I had call upon call from Leeds numbers as I had First Direct accounts. As I was using stepchange (also in Leeds) I Googled a lot of numbers after if no voicemail was left. There was nothing to say to them that I hadn't put in writing already, other than refer to my letter of whatever date when I asked you only to communicate in writing.
Definetly ignore it ... they are trying to get you to pay money to them and with your iva around the corner then you need to simply stay resolute and say no.
Sharing from experiences of dealing with debt
There is a solution for everyone .... Just need to stay positive !