Date approaching and no sitter?

HI Everyone. Hope everything is well.
I have a quick question: We had our 1st sit last month and our sitter was very nice we really really loved her which was a perfect 1st start to the website, but now, I have a post since 2 weeks ago and I have lack of applications ( just 3 ) 2 already got a position after I replied to them( one took 4 days to reply after I confirm the sit) and 1 she is not in UK, due to travels issues I do not want to risk it as She wants to arrive same day, so its a no.

I have sent tons of messages to sitters 15/20 or more, They all have plans or their planner was mistaken with dates etc, SO NO luck. I wrote to TH and they gave a boost to my post , great! BUT, leaving in 2 weeks time still no sitter, If I have to pay for last min Dog accommodation for two dogs in LONDON! we know is not gonna go cheap and I could have saved if booked in advance. who pays for this?

Have someone been in a similar position?
Thanks for reading!
Enjoy your day.