I booked a shipment and paid the delivery guarantee service. The courier failed to deliver on the pre-agreed date because some logistics problem arisen and my parcel was delivered the following day. I tried to get in touch with parcel2go customer service but is just impossible using their webchat and there is no phone number or email available to customers. I went through Resolver and finally someone started to reply me. They denied the pre-agreed date was what I was telling them (don't make my same mistake, do a screenshot of their website during your booking so you can get a proof of the date) even when I called Tnt customer service who confirmed I was right about the pre-agreed date. They keep replying the delivery date was supposed to be on the 3rd of January because national holiday but that's is an excuse because TNT (the courier I used) confirmed it was supposed to be delivered on the 2nd of January and the reason it wasn't delivered was because some logistic problem. But they have no shame, even with the support of TNT who says something different, they will keep repeating something else. They won't refund you the service you paid for (don't bother adding the guarantee delivery service to your booking). If you have a problem, you can't get in touch with them. They are just a third party who books for you a shipment using the main couriers available. You don't need them to ship a parcel. If you use the couriers website directly you can get a better deal and a better customer service. I will never use this service again.