Time scale accuracy

I had purchased an external hard drive in February of this year and it went faulty in April after I had moved to a new apartment so on the 3rd of April I took it back to the store and was told that it would take 21-30 days for it too be repaired or replaced.after 30days I called the store and they would either say that its still at the suppliers or they would simply hang up on me and i would have to call again.I then laid a complaint with the head office who then got involved and all of a sudden I received feedback after 42days of waiting for feedback,the feedback was that the item was tampered with even though I had explained that during my process of moving from one address to the other the item got scratch however it did work but stopped after sometime which affected my laptop as it was plugged in but luckily I have insurance for the laptop so it's not a major issue.What grids mu gears is not that they wont replace or repair but the manner in which it was handled.It took more then what they said it would be and the way it was handled from the calls being hung up on me to being placed on hold.I regret ever purchasing from this store never again