saurav_cheeta said:
you are not expected to such cheap work

Those are mainly "harassment charges" and I will be amply justified in taking double.
When they originally came to me, they were paying 25K for 25MB with a new threat from provider almost everyday of bringing down the site for exceeding the quota and the site used to be down too frequently. Even I measured their uptime for a month and can you believe it? It was around 90% which is the most pathetic by any standards!
I have not only provided them good service, lots of space and a far cheaper price, but have also given them complete peace of mind! In the past, they have upgraded and downgraded hosting at will and I haven't charged anything for their fanciful behaviour! Payments have never come on time and I have gone out of my way to do things that were not supposed to be done by me.
Still, those buggers are behaving high handedly and I am in no mood to relent. If they want to walk out, they are free to do so! I will be able to use my time for more rewarding activities!!