Calmag max biogen - severe side effects.

I have been advised by Diskem to use calmag max a biogen product. I have developed adverse effects on this product e.g. severe joint pains, muscle pain and weakness, dizziness, unable to keep my balance. Dont buy this product. The product is very expensive and contain magnesium oxide which is poorly absorbed by the body. For the prize you pay I expected magnesium glycenate. The staff of diskem recommended callmag max irrespective that I told them that I am on cardio-cor 2.5mg x1 a day.