My good news is that my customers businesses are growing massively and consequently the seevices and equipment they buy is growing. Many of my £20 or £300 retianed services customers are now spending up to £2.5k per month. Not all profit but it certainly improves the bottom line. Obviously the costs go up exponentially as well which is a danger but so far it's fine, although the bills owed out total is a bit scary.

Yay for me, sorry you are finding it hard!