also check google playstore policy on change of default country.. u may be able to switch currency and account only once a year in google play. see https://www.quora.com/How-can-I-change-my-Google-Play-Store-country

type in english but use your language to explain clearly. someone who knows your language may respond with solution...

r u using headphones - Radio and sound effects are designed to work when headphones are in use.