I'm having similar ongoing problems with late/non-deliveries of post. I live in Dunstans Road. I'm currently waiting for an ebay parcel posted on 17 December, a letter posted recorded delivery on the same date and a parcel posted recorded delivery on 4 January. Sometimes items are taking up to 3 weeks to arrive when they've only travelled across London, and are overtaken by other items that have come from absolutely miles away. Makes no sense. Plus, today we received all the post for next door - and vice versa, I think, since I've just discovered our post waiting for us downstairs. I shall be adding a complaint to the Royal Mail website as I'm now at the end of my tether. It's making me reluctant to buy anything online at all, which is unfortunate as I'm hugely pregnant and the internet's my shopping lifeline! I've been on to the sorting office but they were no real help; they can't track recorded delivery items until they're delivered, and they just advised me to ask senders to fill in a lost item form if the delivery doesn't turn up after 15 working days. Apparently if this doesn't happen they have no way of logging patterns of non-delivery and investigating accordingly. Frustrating/tedious.
