Extraordinary Service

Earlier this year I moved into my new home and recently found the two inlet valves(which looked relatively new) to be leaking. I called DPE about this. The technical representative was quick to offer replacements, and in fact, had them delivered to my door step the next day. Not only was this extraordinary service, but there is more. On close examined of the old valves I noticed that that they were both discoloured. I realised immediately, that they were much older than they appeared whilst in the cistern. In good conscience, I felt I couldn't take advantage of the situation, and offered to pay for the new valves. They weren't not responding to my email, so I messaged Dirk (representative who delivered the valves), who told me they had read my mail, and were not want me to pay for the valves. I still feel guilty not paying ....but how is that? May God bless this company!