無法登入instagram，please help!

岩岩想登入instagram既時候，佢話Your username or password was incorrect
但我好肯定無打錯ac/pw(次次入都無問題)，check過caps lock無錯
之後我試過改password、del左ig再download過、等幾個鐘，都係入唔到！
我個ac仲係到，睇到d相，只係入唔到。
PLEASE HELP T_T_T_T!! 又或者ig會唔會有可以供查詢既類似客服既野?