Lufthansa — Two times charged Excess Baggage amount

Address: mutylareddy nagar 7th lane, beside teja homes,Amaravthi road

I have booked a flight from(Booking ID -UXBK2R) Hyderabad to Denver ( air India and luftansa) and paid Rs8350 for additional baggage in Hyderabad but during the connecting flight in Bangalore luftansa claimed that Air India took wrong amount for additional baggage so they made me pay Rs(9643)one more time stating that Air India will refund the previous Amount .

Now Air india declining to refund the amount, who will take the responsibility to refund amount
Please find the attached documents for reference and please do the needful for refund