(However, if the buyer does not receive calls. Contact the buyer does not. Contact that is not working. The results will not be known until the buyer receives and contacts at work.)
(However, if the buyer does not receive calls. Contact the buyer does not Contacts do not work The results will remain unknown until the buyer calls. And contact work)
But if the buyer doesn't contact the buyer does not contact work. The result will still do not know until the buyer will answer the call and contact work).