Kotak Mahindra Bank — Credit card blocked without any intimation

I have been a Kotak user for several years and I had been offered the league platinum credit card so I started using that card I had used the card in an emergency situation for around 40k amount but soon after I wanted to convert that into EMI but it was showing under maintenance then I called customer care they told me that my card is blocked I asked the reason but they said they couldn't tell and I had to pay the whole outstanding amount.
It was really very bad experience with Kotak as instead of solving my problem they were saying please apply for a new credit card after 6 months. Why should I use such type of card again?