DHL Express India — worst service ever

I had already put up a complain about DHL for not sending my courier from last 30 days or more. They have asked my address proofs so many times and i had also sent it to them so many times. In this complaint im even attaching the screenshot of the mails i had sent to them and the ones they had sent to me. If DHL didn't have my id proofs for verification how at very first they got to know that the shipper had printed a wrong door number on the shipper's invoice. Following that they asked me to provide
1. A corrected invoice from the shipper.
2. Clarification letter from my end.
3. My id proofs again as per corrected invoice.
In this case when the mistake was from the shipper's end all they had to ask was a corrected invoice from the shipper.
1. Why did they want a clarification letter from me when the shipper is agreeing there mistake.
2. Why did they need my id proofs again as per corrected invoice. Will my id proofs change by the time they receive a corrected invoice from the shipper.
Still following their norms i did send them all the required things they asked and even now i receive a mail from DHL saying they dont have my id proofs so i have to resend it to them again. After one month of this process which was actually not required. I personally feel its a mental torture i have been through. And now after sending my n my husband's id proofs so many times i feel whats the guarantee that our id proofs will not be misused. Why are they asking my proofs again and again when they had them at the very first time. This has become a serious issue to me now.