Neeta Travels — non -issuance of tickets on 2 occasions

A)Travelled on 20/9/12 Pune to CBD Belapur on bus No MH 04 G 8955 boarded at Bremen Chowk in Pune at 0550. Paid Rs 600/- for 2 tickets before boarding. Despite several requests no tickets were issued.

B) Travelled Vashi to Pune on 21/9/12 on bus No 9107 boarded at 1630. Paid Rs 250/- no tickets were issued despite several requests.

My question :1) Why were no tickets issued ? Is it not mandatory to issue tickets ?. Would a passenger be able to claim compensation had an accident happened ? & he had no ticket to prove that he was on that bus.?