General British English has two affricates: tʃ as in church and dʒ as in judge. It is quite a common non-native speaker error to reduce the first of a sequence of two affricates to a plosive. The phrase which cheese is pronounced wɪtʃ tʃiːz NOT wɪt tʃiːz and orange juice must be ɒrɪndʒ dʒuːs NOT ɒrɪnd dʒuːs.
Alternative sound