Intolerance to cow milk

Hello. Our pediatrician recently told us, further to some test results, that our three-year-old son has intolerance to cow milk. She suggested that we eliminate cow milk and products from his diet (preferring goat milk and soya products instead).

I was wondering if anyone has had the same problem and how they dealt with it. Which products have you used as replacements (for e.g. milk, cheese) in your child's diet and which shops did you use? Thank you for your attention.