Punjab Roadways — fare issue

Me and my husband was traveling from Delhi to Chandigarh. We asked the conductor so many times but he told us that bus is totally full... At the end moment we again asked him for seats he told us that I ll provide you seats but you have to pay 1500 for 2 persons... The actual fare was 570 rs as mentioned in the pictures.. We could not say him anything because we were getting late... He was looting the other passengers also because all the other buses were full due to festival holi... And he was taking advantage of this... It's my humble request please take strict against this tout... Thanks