Hero Fincorp — Dues clear still receiving messages for cleaning dues

I have completed my total due to company and still iam receiving msg for clearing my dues ...as further there is no confirmation on my due amount i.e some msg state amount of 70 thousand, some of 62 thousand and moreover when i check it online my due is 0 .
Futher when i try to call customer care the line is busy
Please give me clear answer for the above happening.