From an online retailers point of view:
These strikes are killing my business. I will lose a week's worth of trade. I cannot claim for missing parcels as I'm a business customer and there is no compensation for anything other than special delivery, and even then you have to jump through so many hoops it's barely worth it. I cannot use another option. Evri is the next best price wise and it's at least twice the price for large letters, which is what I mostly send. They are also vastly behind because they don't have the staff (we don't have a driver in my area, he quit, leaving the parcels building up in the depot). DPD have stopped taking orders if you don't have an account. There aren't many other viable or affordable options and you the buyers wouldn't pay £8 to courier a £5 item.
With Royal Mail depots, first in is last out. The couple of days after Black Friday are ALWAYS a hotspot for delays, even worse this year.
Items are taking two weeks to arrive now. Please consider this when you are contacting small businesses. Yes, we get it, you want your gifts for Christmas, but our stress levels are already through the roof after a really, truly, shitty year of trading. We don't need people demanding refunds or saying we are fobbing you off. I, like many others, are paying for postage upgrades out of our own pockets to avoid delays. I can't afford it, but I can't afford to lose my 11 year old business either.
A lot of us are working stupid hours to get items out quicker. We are tired, reduced to tears most days by vile customers, and we really, really need the money.
Please bear all of this in mind when contacting companies.