My climbing rose leaves have become mildewed?

which I treated correctly The leaves then looked scorched and further leaves are distorted there are tiny blackfly too I got rid of a lot of them but the rest are sticky and the whole thing looks terrible the flowers however are good and there are lots blooming Should I wait until its flowered and then cut in down or take it out completely This is its second year and I am inclined to think that the soil is to blame as the wall is the side of my house Any help please as I hate to kill plants if they can be saved