This is a difficult question for almost any of us to answer without seeing the actual plant you purchased. Not all rose plants of the same variety are necessarily of the same quality. The plant you purchased might not have been a solid plant to begin with, and there may have been problems with the graft, or budding, which caused the rose grafted to the rootstock to die or perform badly. Clearly the rootstock was strong enough to send up suckers, but, of course, that is not the rose you wanted to add to your garden.

If you really like the rose, I would try another plant.

Smiles,

Lyn
helpmefind.com