A buyer requested an order which i delivered and he accepted delivery after some hours he sent a message claiming I did nonsense. He wanted me to modify the work after making three modification and he said was okay. Now he claims his lecturer wasn’t okay with my work after making it clear to him I was going to use simulator and he said no problem with that. He actually demand I use real network devices and start project afresh.
After a lot of stalking i decided not to reply him and now my response rate has dropped to a 80. How do I go about such buyer.