Reliance Communications — network

Hi,
Long back i used reliance postpaid services, then i ported it to idea.
Before port i cleared all my bills with reliance.
Now, again they are asking for remaining bill (310) after so many months.
And according to my knowledge there are no outstanding bill.
They did not contact me even once and i tried all possible ways to contact reliance but no luck.
Please provide me a number to contact or contact me to clear issue.
Reliance have really pathetic serrvice and customer care.

Regards,
Aslam
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