Corporation Bank — No proof of payment provided

Address:	Jalandhar, Punjab, 144003
Website:	m.corpbank.com

My name is Sumit. My mother has an account with Corporation Bank. Last Saturday, an amount of Rs. 700 was deducted from her account. When I visited the GTB Nagar branch to get a proof of payment, they simply said "we can't give you that" . I mean it's my money and I was not told where it was being spent. Proof of payment is the basic right of the customer and they refused to obey it. I want my money back or a valid proof of payment.