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Unfortunately even having a a visa doesnβt automatically guarantee the holder will be permitted to enter any country. Border/Immigration officials are still entitled to refuse entry if they are not satisfied with how you present yourself and your intentions on arrival. As youβve discovered, arguing is the worst thing you can do in this situation. It is advisable to carry the papers you used to support your visa request with you, and to make sure you can demonstrate, if asked, that you have sufficient funds available to you during your visit and a return/onward ticket to show your intention to leave.
You must keep the paperwork you were given both for your personal reference and because the incident is likely to affect your future travel, depending on where youβd hoped to visit. Certain countries eg UK, typically ask about immigration history over the 10 years prior to an application. You will need to disclose your deportation where this information is required.