Genital warts???

So i have genital warts the clinic have told me before ( I only had 1 small one). She froze it off with freezing treatment. However it’s came back again and it’s so itchy. I know once you got them there no stopping it. But is there anything you can buy in the shops for when this comes back to get rid of? Or do I have to keep going back to the clinic ??? Anyone else have genital warts 😫😫😫