The Brainliest Answer!
Yes, i do just go to that chat one flag sign u will see just click that and click block nthng to do much..

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than what's the right method pls tell me
but ur method is not for deleting the msgs, but blocking someone....
i think there is no way of deleting msgs
yaah i too think so
hmmm... okkkkkk
yes you can simply block the user :top right ,white flag

i hope it helps......... 
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