Flipkart — Fraud with my account

My Account has been blocked by Flipkart without giving any prior notice, I ordered a campus shoe of price RS 1259 from pay you later service but the size of shoe was smaller so I requested them to replace it but there was no any option of it that's why I proceed it for refund and then they blocked my account and when I asked them they says due to high number number of returns but they did not said what is the maximum number of return from a single account. Please unblock my account I am using it from 2019.