Indian Overseas Bank — Bank server down often

Today after eating, I had no cash .
So, I went to pay in gpay or phonepay but it responded as bank server down and then, I took my debit card to pay but it too responded as bank server down. I even have 1k in my IOB Bank account balance. I even asked my friends to pay as they too have iob bank account, it resulted in bank server down. I'm very tensed in it that often - the bank server of IOB bank is down many times in this month. Even yesterday, I had this same problem and a week before also and many times - the bank server is down.