I agree, soapy water is the trick. They never get immune to it, because it kills them mechanically, not by poisoning.
You need to spray with a fine pump sprayer, not the hose. Cover all the leaf surfaces, undersides as well as upper, and all the stems. A mild solution is best, about 2tsp. of any dish soap per gallon. Stronger is NOT better, and can hurt the plant. You probably need to do it a couple of times a week for a couple of weeks to get all the adults, then all the new ones hatching out. Then keep a close eye out in the next week or two for any more showing up.
Very important! Don't spray the soapy water onto the leaves when the sun will be on them (evening is best). Even a mild soap will burn the leaves if the sun hits them while the soap is on there.
I don't know if digging it up right now will help anything, Doris. Use the soap solution, let the plant recover before you traumatize it by transplanting.