Did the shopkeeper tell you what steps he took in trying to recover the data?
If not already attempted, the first step would be to check and fix errors on the disk using the chkdsk
command in command prompt. The following article explains how to do this: http://support.microsoft.com/kb/315265
. You'll need to connect the maxtor hard drive to the computer either by slaving it alongside the new hard drive, or by using an external hard drive enclosure.
If that fails, there are numerous data recovery software available. Probably the best out there is SpinRite
. It's not free, but it is wideley renowned for recovering data from seemingly dead hard drives. What's more, it has a 30 day guarantee.