try to add them again

@A MyCOPDTeam Member Hi Debbie, I am sorry I haven't come across this problem before, I would suggest that you invite him/her to ask to become a member.

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A MyCOPDT...

I would think like on facebook go to where you blocked them and un block. Do opposite.

I have no idea either

If you've got smart phone go into your calls recent go to the person you've blocked tap the information sign scroll down and it should give you the choice to unblock