If you do not already have an account, I believe your geographic location dictates where you can buy a plan - otherwise people would be bargain shopping around the world based on exchange rates and pricing differences in general. You likely need to purchase the subscription in India. If you are from the UK and plan to be back there soon it is better to purchase the full plan when you are there, with an account based on being there. For the time being, while you are in India consider getting a month to month subscription (not an annual subscription paid monthly) so that you can cancel it anytime without penalty. It costs a bit more but it is likely the better deal for your current situation.
Creative Cloud pricing and membership plans | Adobe Creative Cloud
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