Dear sir, really speaking its sad state of affairs. Actually, no guarantee can be withdrawn by this kind of notice. Even though your got separated from you, that does not absolve her from liability. She continues to remain liable till entire amount is repaid. Upon receipt of such letter from your wife, Bank could have transferred the facilities in your name and could have continued the facilities. It is arbitrary on part of Bank act upon such letters and stop operations in account. You can file consumer complaint. you can file civil suit also for damages.
Bank can not close or frozen their customer account without giving notice or general information. You can file a case in consumer forum for Deficiency in services and a private complaint under criminal breech of trust
DISCLAIMER: The guidance provided above by the lawyers is based solely on the limited information made available to them by the respective querist. These answers are general guidelines and not specific legal advice or legal opinion. All answers are made in individual capacity and do not reflect the opinions of any employer or organisation. Kindly refer to MyLegalWork's Terms & Conditions of use.
Thanks for the information, our executive will contact you in a while.
firstname.lastname@example.org | +91 9508888989