Collingwood Golf Co review for ShipStation

Used to love this app, but recently have had nothing but headaches when trying to ship DDP from Canada to USA with UPS. Terms & conditions of their "DDP Guarantee" changed without notice and now only apply to US shippers, so now they are suddenly trying to charge me nearly $1000 for extra duties & fees on shipments that were delivered over 12 weeks ago. It is not ethical to triple the charges on shipments that were paid for and delivered MONTHS ago. Absolute insanity.