Refound, it start look like a scam

i buy avast for year and disable automatic payment on paypall, as i wanted it only for a year, and now it takes money as a automatic payment, how did it even renew? i dont want this product, and even more ti charges even more than product cost, ofc, no support works, cant send any refound or cancel request, is avast even legit, or scam page?? someone can help me???