Bad contract or stubborn developer

Whilst travelling I agreed to do a contract for a company I worked for previously, they knew after a few months travelling that I decided to live in asia (trip to thailand = fall in love) and we agreed a fantastic flat rate per month (so I could continue) under the condition they dont muck about with invoices (they said fine), I charge GBP2.2k a month and they do at least 15 full working days per month. I've contributed to various open source projects and previously I was on 327-400 quid a day in london (means nothing if you see the numpties Ive worked with), I continously strive to better my understanding and program in clojure, python, c# and whatever else takes my fancy etc..

Now instead of the usual 7 day invoice turn around (condition of rate) its been 55day and now 30 minutes ago the website is down and Im going to bed.. Bad idea? Ive sent 5 automated reminder via invoice SAS and 3 emails, so I figure Id wait until I have 5 emails back?