Planet fitness and landau sammers

This is the worst gym company ever I have been with them for 3 years and cancelled my contract which was in arrears and I was handed over to Landau collections in March and I managed to pay once at landau thereafter I was sent a link by planet fitness to pay and I paid the outstanding balance in April although their Landau people are still saying that I owe them and they want proof of oayment which they received but they are still not clearing me…There’s clearly no communication between planet fitness and Landau collections..they are just here to **** us