Poor service

I have been trying to cancel my investment and I am not happy with service. I went on the 17th June, they then sent a message on the 5th July saying that I need complete compliance form. I went again on the 11 July for completing the form. On the 14th July I received a message to say I need to submit documents then I went to the branch on the 16th July. On the 28th July I received a message saying I should submit documents they requested on the 5th and 14th July failure to do that my request will be closed on the 11th August. On the 17th June I was assisted by Ms Mosetlha, on the 11th and 16th I was assisted by Ms Linda Ngqola. Old mutual is failing to assist me with my request, I end up going to the branch many times with nothing to show