EMAILS DELETED WIITHOUT BEING READ

I registered a claim with nedbank for a burst pipe in the wall, they requested me to send them a quote for the repairs, i sent the quote and requested a read receipt. To my shock i get a email back stating, \you're email has been deleted without being read""; in the mean time ;my water bill is increasing due to the fact that the burst pipe is not attended to as yet. Terrible service."""