1) You have made no purchases at Hunkemöller within 365 days, meaning you will go down 1 level and your points balance will be adjusted to the number of points at the end of that level.

2) You have redeemed your Passion Points for a voucher.

3) You have returned a purchase, with the Passion Points earned from this purchase being deducted from your Member Account

Vouchers that you have earned from reaching a (higher) points balance will be removed from your account due to your lower points balance. The Shop Credit you have acquired will not be affected. If you return a purchase for which Shop Credit was used after dropping a level, this credit will be returned to your account.
Given that vouchers can only be used once, dropping a points level will not entitle you to vouchers available at a lower points balance if you have already received these vouchers.