Original von C-Bear[...] OK, i now have paid 18 euro for a 26 euro dildo.[...]
An idea occurred to me: If it's a 26€ dildo and you've paid 18€ and don't want to pay for return shipment, there's still an option to sell it. It's new and unused, isn't it? Selling it for 18€ should be quite easy if it's of higher value. Maybe 22€ would do it, with some Euros in benefit for your effort. Well known auction platforms or small ads will help.

If you've already used it, decreasing it's value, then it's your fault.

I don't think they "try to swindle people out of their money" by shipping products of higher value then ordered and payed. Sounds like a ridiculous business plan.