For what it's worth I just tried reactivating HelloFresh using a voucher from Facebook (FRESH100, didn't work, said it was for existing customers only??). I immediately cancelled saying it was too expensive and shortly afterwards got a "come back" email with an offer for 2x30% off. This one was a click-through link in the email, there was no voucher code. Anyway it's worth a try if you have tried all the other vouchers here.