Annoying I agree , and it's a common ploy by most / all Chinese sellers to ask and beg for negative feedbacks to be changed, some with excessive stories of woe.
Listen to none of it, send one message to say if you receive any more messages you are reporting them to eBay.
If you still receive them, don't read them press delete, and they'll soon stop and unfortunately will probably move on, and pester someone else.
@tamtonkin
@tamtonkin