Refund Outstanding for 3 Months and Counting

Worst Service Ever. Sent Out a Parcel to the UK on the 21st December 2017. Tracking Service shows it left the local Post Office on the 23rd, and never arrived at the outgoing international postal hub since. Filed a claims form for a refund for the costs of sending the lost parcel on the 7th January 2018. been 3 1/2 months later, and although Speed Services acknowledges the parcel as missing/lost, refuses to refund until an investigation into what has happened to the parcel is completed. (which could take up to 6 to 8 months according to them) Ridiculous. It's lost. We have admited that. Now please be as kind as to refund me. WHY and HOW it got lost is YOUR problem, NOT mine. So why can I not receive my refund in the meantime, while your company tries to figure out why YOU lost it, not me. Incompetence has a new name in the courier game it would seem.