Rather than fighting here take a small piece of advice from my end. Get a new contract @ their new rates. These are paying exceptionally well. I got this notion from a discussion at their forum and it has worked. This is how your old investments will get covered. Decision is yours. Over to you...
I checked that
new contracts are "new" only first 3 weeks
then they start to pay like "old" contracts (100 satoshi/ghs/day)
Incorrect. You have not yet waited 2 week since the new rates have been in place. By new contract, I mean new rates here.