YANBU. The corner shop (that was a P.O. too,) where I used to live some 10 years ago was full of miserable mardy fuckers. 3 women used to serve there and they acted like they hated their lives. They huffed and puffed and whinged at the smallest, most reasonable requests.
Also, I used to take ebay packages there, and would give them 8 to 15 packages a week, and the postage would be say, £33 postage for 11 packages, and they'd put them aside and take the money and say 'we'll sort all these when we have time.'
So I would give them the £33, and every week (for 3 or 4 months in a row,) I was getting complaints and negative feedback, and having to give refunds, because some of the packages were getting there with no postal label or stamps on. (And the customer was having to pay the postage, and a £1.00 charge on top) before they could get their item. Many packages I sent overseas didn't get there!
I couldn't prove anything, but I was convinced they were sending my packages (maybe 1 in 3) with no postage on...(and pocketing the money.) Especially the ones I was sending abroad as there was no way to track them like with the recorded delivery you could get here.
I lost loads of money, and actually complained to the manager of the post office that my ebay customers were receiving their packages with no postage label and I think the women behind the counter were not putting the postage labels on.
I never accused them of stealing, but I said 'SO many people have got packages with no postage label on, and I never see them put it on as they say 'we will do it after...'
I got a short shrift from the manager who said he would sue me for calling his staff thieves. (I didn't! I thought they were but I never said so,) and so I said 'stuff your stupid post office then! I will go where I won't be ripped off and where I will get better customer service!'
Annoyingly this post office was 10 minutes walk away and the next closest was 3 miles!
Made my ebay selling more of a chore!
However, the entire shop including the post office closed down about 7 or 8 months later. And the manager, and his 3 staff were never seen again! Never did find out why!