[Resolved]  Airtel — over charges deducted

I am useing a airtel prepain no for more than 4 years and I am having a friends plan in which if you make a call to any airtel no.between 3:00 - 5:00 pm and 10:00 to 8:00 pm it charges 0.10 paise/min. The issue is this sometimes tmes they charge me 1rs/min. I called to customercare for this why it is happening the told me the timeing is changed it is to 11:00 PM without any prior notice. The another issue is this on 26th I made a call on an airtel no at 3:25pm and talked 16:34 mints and the chareges deducted from my a/c was Rs 8.90. I called to customercare and told the problem he replied me that I made the call at 2:52 pm. Thats why the charges are Rs. 8.90. I can still see that I made a call at 3:25 pm even if you want i'll send the screenshort of my mobile. It can't possible that the time difference would be 32mins. as I mentioned above I mentioned above i called at 3:25 an d in airtel's records it is 2:52. Even I asked him on that day the last call I made was what time in airtel's record. the no I dailed last was [protected] at 8:33 and it was 7:54 in their(airtel) record. after 15mints I called to customercareat 8:48 pm.
Now the main issue is this the time they are showing is wrong and even they have refunded me balance in month of december. You can check in the records but it is not possible for me to check again n again after making the call that what is airtel charging to me. It's a strait away fraud airtel is doing with me. If I will catch them they refund me or else you understand. So I want airtel to refund my money back and don't harash me by doing such type of fraud. If you want I can send the screen short of my mobile phone with the timing I dialed on above mentioned nos. Please revert me back and I am also sending a mail to Airtel.