Pathetic service

I have been trying to contact someone regarding my retirement annuity, which I would like to freeze whilst on maternity leave. I have been struggling for over 2 weeks for someone to contact me. The financial adviser that was allocated to be does not answer his phone, or any e-mails. I am at the point that I would like to cancel the whole thing with old mutual but cannot seem to get through to ANYONE to do this. I would not recommend them to anyone! The service is beyond pathetic! I will block old mutual from being able to deduct any funds off my bank account.