If you need an alternative method to centralized exchanges for buying Bitcoin your answer might be LocalBitcoins. The site provides a peer-to-peer marketplace for users to get together, buying and selling Bitcoin without oversight from centralized exchanges or financial institutions.
Paxful is a global, peer-to-peer marketplace used to buy and sell Bitcoin easily, without the use of a third party intermediary, such as an exchange. Think of it as the eBay of Bitcoin as it connects buyers and sellers, and lets them set their own price.
Paxful was started in 2015 by Ray Youssef and Artur Schaback and is incorporated in Wilmington, Delaware, USA. While it is a U.S. corporation, it faciliatates trades on a global basis, and can be used in most any country in the world. The exceptions are those countries that have an outright ban on Bitcoin, and some countries that are under trade embargos by the U.S. These unsupported coutries at the time of writing are: Balkans, Belarus, Burma, Cote D’Ivoire, Cuba, Congo, Iran, Iraq, Lebanon, Liberia, North Korea, Somalia, Sudan, Syria, and Zimbabwe.