Trouble returning my One for a refund

[ChazBP]

I am incredibly concerned by this companies inability to protect and ensure its customers are looked after. I have bought a Fitbit in the past and as happy enough with the product that in January of this year I decided to purchase a Fitbit one for my husbands birthday. However as the weeks went by I changed my mind and decided maybe it wouldn't be the product for him. So once it arrived I contacted Fitbit and asked if I could send it back for a full refund- the Fitbit remained in opened and all accessories still remained boxed. After an extraordinarily complicated process- which I believe is totally disgusting in this day and age - whereby most retailers leave all customers a return procedure / form Not Fitbit - after much wasted time waiting to get a case number and returns ok from Fitbit I was finally sent the details on how to return. After paying £12 at my local post office to return the Fitbit back to their warehouse signed for and tracked I mistakingly lost the tracking number. Which is my own fault. However with the package being signed for I have been assured by the Royal Mail that if the package wasn't signed for because it did not reach its destination it would have made its way back to me. I have contacted Fitbit support every week for the last 8 weeks concerning the Fitbit and my refund of £110 yet they have not yet done so because their warehouse hasn't notified them of its return yet. This is 2017! Packages like this paid for 1 st class tracked and signed for don't get lost. I am absolutely dismayed and at a loss of what to do next. £110! Is a drop in the ocean to such a large company yet huge to me. I can't name any other company who treats customers like this anywhere else. From reading through others forums it seems returns and refunds seems to be a policy Fitbit isn't forthcoming in.

Moderator Edit: Clarified subject

[USAF-Larry]

@ChazBP, I am sorry to hear that you have had such problems returning the Fitbit after you changed your mind. I have heard so many positive things about Fitbit's Customer Service, it is unfortunate when things like this happen.  One statement you make, though, "This is 2017! Packages like this paid for 1 st class tracked and signed for don't get lost", is not correct.  I have had many packages that I mailed with tracking numbers get lost in shipment, with the Post Office having no way to find them - fortunately for me, though, I usually ship via USPS Priority Mail and it is insured for when it is lost.