State Bank Of India [SBI] — home loan insurance

I have taken a home loan from sbi racpc in the name madhu aggarwal with joint name narinder kumar gupta bearing loan account no. [protected] of a under construction flat about 2 years before. I got a letter from sbi sector 8 chandigarh branch that an amount of rs. 23691/-will be deducted from my account on account of general insuarance of the property. I wrote them a email breifing all the facts that my property has itself insured because our builder already taken loan from other banks & we have submit other bank triparty agreement between us and builder, other bank at the time of taken loan from your bank. Then there is no need to insure the property again as still it is a construction based flat & property documents will be execute in our name after completion of construction & possession taken by us.
A representative ms suruchi from bank also contact us after got email from me & then i have also explained all the details to her. But shocking withour further communicate me the bank have deduct a sum of rs. 23691/-on account of insurance. This is very rediculious.
This is very bad attitude of the bank. Kindly check & resolve this matter.

Thanks & regards
Madhu aggarwal
[protected]