British Banknotes and a Postal Service in a Mess

I am having major problems with post, as are so many others. I am waiting  a Special Delivery package that was posted ten days ago. It still remains in the Medway Centre. Other notes posted overseas  by using tracking mail have ‘disappeared’ from the system. The notes sent out are a few thousand pounds, one very rare note is the high value item and I may have to refund if the problem persists. I  am considering using another carrier for mail so if anyone has suggestions, let me know, please. Publicly, I am not taking sides in the dispute, just expressing the reality of the situation for me. Personally, when I see Boris Johnson has been paid £1 million for four talks, it is hard not to have support for those pursuing better wages.