Since your wife has ideally withdrawn DV case by taking 2L and 5.5L is still pending to be paid to her, there is hope that she will not withdraw her consent for divorce later. However to play safe pay the balance 5.5L in front of the judge by cheque / DD & ONLY on the final date of settlement, when the judge will pass the order for grant of divorce
You should have included an important clause in the agreement for settlement that your wife cant backtrack later and if she does it for whatever reason your wife will have to refund the amount paid with interest. (put a legal clause)
Also im hoping this affidavit copy for SETTLEMENT i.e DIVORCE was signed and is already presented to the court. The agreement should specify that your wife will take back all cases pending against you.
WILL NOT file any case in future once the amount of 7.5L is paid asfull and final settlement amount,
This final settlement amount once paid ,wife will relinquish her rights from claiming ANY maintenance or ALIMONY from you in the future. Also that this agreement is signed with her consent and freewill and not under any pressure from anybody (appropriate legal language can be used).
All the Best !!