CLASH SMS Verification not working (T&T)

Hi, I'm from Trinidad and Tobago my country's phone numbers only have 7 digits I try to enter my number and it does it work it says invalid number i have tried : (868) xxx-xxxx +1 868 xxx-xxxx when it try to enter xxx-xxx, it auto corrects to (xxx) xxx-x and does not allow me to submit when i try 1868xxxxxxx it auto corrects to (868) xxx-xxxx doesn't matter who's number i try to enter, it says invalid number for every number I've tried (4 ).
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