Incorrect ebucks reward level/allocation

This is the third month in a row where my reward level and ebucks allocation has been incorrect. The first month I sorted out quite easily by calling and it was rectified a week later. I tried to do the same for my October allocation but I've been waiting for 3 weeks already and I've called 3 times and it still hasn't been fixed. Now I just received my November allocation which is also incorrect. Please can someone call me and actually get this rectified. I'm tired of calling for 15 minutes at a time and getting no where.