handed over to 3 different compaies

not long ago i called standard bank to make arrangement to pay off my credit card, to my surprise no one from standard bank is phoning me with arrangements of how to pay but three different collection companies phone me with different amounts within days. i need to know how many credit cards i had with you and which out of the three companies must i pay. i only managed to get two out of the three companies names as the first one when they called i made arrangements to pay the amount via debit order and gave them my banking details. which now i wonder if i did the correct thing. the other two companies are nimble collections with R8361.36 and another is DMC. CAN I HAVE THE CORRECT COMPANY TO PAY WITH EXCLUDING THE LAWYERS FEES AS I PHONED TO MAKE ARRANGEMENTS.