Oh squirrel, I had a meltdown too today. All about splashback still not arrived, so the tiler can't finish etc. etc - for the want of a nail or whatever the saying is.
The final straw was that the electrician having finished (hurray), locking the door but turning the key too far, so I couldn't get in. No garage key with me, no way in through the back. Poor DS got his mum sobbing 'I just can't cope with all this, I really can't' down his phone. 
A kind neighbour took me to DS at work to pick up his house key, then to his house so I could pick up his garage key (and remember to put his house key in a safe place) then back. Was angry with myself
for not having garage key, with electrician for turning key too far, for having a meltdown, for not having DH to rely on, with him for not being THERE when I needed him.
When I got back I had a good run-in with the splashback person. After a long convoluted story about damage to first one, ramble ramble, she told me it would be coming from Hayes, 'you know, near London, so a long way'. To which I replied that my case had arrived overnight from Germany. 'Oh well, Germany, but this is Hayes and it's in Middlesex you know'. I replied that Middlesex was hardly Timbuktu but no response, so I presume her geography in regards to distance is even worse than mine. It's the inefficiency of it all that makes me furious.
book - my son's lovely partner is a primary teacher who came round to pick up DS's key and sat and chatted for nearly 2 hours, telling me inter alia, about some of the children in her class, lack of management backbone to support the staff and generally cheering me up. 
Thank you, her and all of you on this thread for keeping me relatively sane.