Hi kayjays and welcome to the forum
Insist the next time you ring you speak to your IP personally. Do not be fobbed off by a member of staff, and also ask for the IP's e-mail address. Send an e-mail to them and ask for a read receipt - and express your concerns at not receiving a phone call back. Make sure that you make it clear that their inaction may be jeopardising your mortgage, and that you will inform the creditors directly if they do not start co-operating with you.
IP's (including myself) are extremely busy people at the moment, but should always take time to speak to the people who are contributing to their income.
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