Being ignored after they failed to upgrade policy!

In Feb 2015 I submitted a request to upgrade my Severe Illness Policy from Comprehensive Plus to Elite. I have not yet been assisted. Old Mutual have been investigating my submission for 3 months with no feedback. They also refuse to confirm the upgrade and I get sent from one call center agent to the next! Old Mutual has declined a claim on this basis, which is valid should they have upgraded as per my instruction in Feb. Poor service at the call centers and no contact number for their complaints department. No feedback to numerous emails I've sent. Disgusting service & purely a stall tactic!!!