have i killed my rose by pruning it?

I am new to the forum, and had not done any research on the correct time to prune roses...and today, pruned my shrub rose (graham thomas) down to around knee height.
Earllier this year, it had about 6 extremely tall stems, each with about 20 flowers on - and the stems could not take the weight of the flowers, so required staking.
Now there are no flowers left (i dead headed them all), I pruned the stems - and then panicked, when someone told me i shouldn't have pruned until feb/mar time.
Will the rose be ok, have i killed it, or is there anything i can do to keep it alive?

thanks,
carol

 

Welcome to the forum CS13.
No, you have not killed your roses.
For best results you could have pruned them at a better time.
But those roses will be back for sure.
As a general rule I would say prune in early spring.. Get your worst enemy to do it. That is, prune hard, down to ground level. Few of us have the courage for it.
Whatever you do, those roses will be back. Enjoy them.

 

Thank you. It's a relief to know it won't die on me, as the flowers were beautiful on it this year.
Carol