"Buzz Bee" is a mobile phone provider who has targeted a suburb in Melbourne that has many recent immigrants to Australia. The contract states that overseas calls will be free providing they are made between 6pm and 6am.

Ishan who spoke only limited English signed up for a mobile phone as he had family in Turkey and liked to ring them two to three times a week.

When Ishan got the account after the first month he had been charged for his overseas phone calls at a very high rate even though he had made the calls between 6pm and 6 am in Australia.

When he asked "Buzz Bee" about the charges, they said the phone calls were made after 6am and before 6pm in Turkey time and therefore he had to pay under the contract.

Ishan no longer wishes to use Buzz bee and wishes to terminate the contract.

What provisions of the Australian Consumer law may assist Ishan?

What cases would help your arguments?