LNDR MESSING UP MY CREDIT SCORE

Had a loan with LNDR, paid up my loan but still listed on Transunion to say I still owe them. It's been 6 months since I paid off, been calling every day begging them to rectify or update on Transunion still no joy. LNDR IM BEGGING YOU, YOU ARE MESSING UP MY CREDID SCORE, PLEASE FIX THIS NONSENSE ASAP. My email address is ***, PLEASE SORT THIS OUT, I DO NOT OWE YOU ANY CENT.