I need to purchase a round trip fare from DEL-SYD but the website won't allow me to do it. I checked the fare rules (M class) which states tickets must be purchased in India. I can get seats confirmed and a PNR online but tickets have to be purchased by a certain date. If I call TG in London will I be charged the fare in INR as quoted online or will I have the fare recalculated which may be more? Can I even purchase these tickets with a UK credit card outside India? Thanks.