Bring back my money or re-instate my mother's life cover

I had a life cover for my mother with Old Mutual and cancelled it without notifying me when I wentry to them and asked for reasons they told me dat I had exceeded the 15% that is allowed on my payslip and I asked why was I not told cos I hv had the life cover for years they said they dd sent me a letter which theyou didn't cos if they dd I would have done something about than to let my money just go like that. Old Musual is a very big and trusted company so I need them to re-instate my policy or give me back all my premiums.