Bharat Gas — without delivered mentioned it delivered.

with due respect i want to say that i am a consumer of bharat gas agency R.k enterprises, b-51, mauriyalok patna. my consumer no is 20873. i booked cylinder in 23.7.13 but do not get delivered and in previous report show it is delivered on dated 25.7.13. when i go to complain to them. they gave me cylinder on dated 12.7.13 instead of 23.7.13 of booking and advised to me that again u booked cylinder. when again i booked cylinder on dated 12.7.2013 and today 25.9.13 i go to office for received cash memo then they told me that you already received a cylinder on date. they did not give cash memo and when again booked a cylinder then mentioned it is delivered in computer . but did not received it . also in my consumer card as do not mentioned. please help me regarding this. i will be thankful to you