Vodafone has filed its appeal to the Supreme Court challenging last week’s Bombay High Court order that said the Indian tax authorities could charge Indian tax on its $11bn acquisition of Hutchison Essar in 2007.

Vodafone released a statement today saying that the company remained “convinced that there is no tax to pay on the Hutchison transaction” and would “continue to defend this position vigorously”, according to the Times of India.

The Bombay High Court had left open the option of an appeal, which was to be made within 12 weeks. The court also ruled that the tax authorities would not be able to make a final decision in the matter until eight weeks from the date of judgment last week (8 September).