Flipkart — Product got cancelled and mental harassment

I have ordered a bottle from Flipkart in offer price and it was showing it has reached nearest you. Now Flipkart canceled the product without my notice. Price of the product is also high now and when complained to customer care they are saying “we cannot do anything”. I have waited for the product and they are increasing the delivery time and patiently waited again and now at the end they canceled it. It was a harassment for me. Why they launch offers which they cannot met to their customers. It was a complete harassment.