Yes, Chase did that to me as well. I called them and they said something along the same line. THAT is what congress should address: the option to change the agreement based on such clauses. I have 1 CC now, in case of an emergency with the car or need to fly someplace.
Eventually, Chase bought out several other credit card companies where I had accounts. I could see that I was about to be victimized again, even though I've never been late, much less missed a payment.
It occured to me that two could play the game of abrogating contracts. I declared bankruptcy and left Chase with no money other than that which they had gouged from me on the increased interest rate.
It was very satisfying to stick it to them for a change.