i have betaalachterstand

Hello good afternoon  its someone can help me I have achterstand. But I just pay already this morning and o just notice that I get an mail that they send already via in prevented I just already email as well but I just confusing if I can still fix my telephone like I can still call or someone’s still can called my as I realty need to my work  I hope someone can help me what should I do? I just email the preventer and send my receipt that i already pay this morning