Zest taking payment, but no service received back

<p>My Mother has a Zest T1 of about two years old and the battery doesn't have much life in it left. On Oct 17 (10 days ago) I emailed their repairs centre to ask about a new battery. One of their consultants, Sameer Morris gave me the details of costs etc. We made the payment, send him the proof of payment and haven't heard a word from Zest since then. On Oct 21 and Oct 26 I wrote again to Sameer asking why we haven't received the battery, but no reply. I even called their phone-line, but it only rings once and then the line goes dead. Did we now pay for a bogus service from Zest??</p> <p> </p> <p> </p>