Fix PrestaShop Schema Issues

I need help resolving several schema issues on my PrestaShop store that are affecting Google Search Console.

Main issues to fix:
- Invalid value in field 'sku'
- Missing field 'hasMerchantReturnPolicy' (in 'offers')
- Invalid object type for field 'brand'
- Missing field 'shippingDetails' (in 'offers')
- Missing field 'aggregateRating'
- Missing field 'review'

You should have:
- Experience with PrestaShop
- Ability to work with custom plugins or modules
- Knowledge of Google Search Console and schema markup

Please ensure that all issues are fixed.