Second hand goods

Second hand goods. After purchasing a generator on the online store and receiving a second hand one with service tag dated 9 months ago with the unit smelling of petrol and scratch marks all over it, I tried processing a return. Unit collected 2 days later, no word from them for another 3 days until I called and emailed. I requested a new unit but there was no stock. They gave me a credit on their website without discussion. I again called and emailed to request my refund to my account but was told that I need to go to the store that processed the delivery which is in Tokai- 1 hours drive away from where I stay. I requested a different generator amd was told the same manager(Chantel) who should have called me a 10 days ago will call me after my last discussion with the store 4 days ago. Still no call from the alleged manager. No call or email from Builders despite numerous emails. Last email sent 3 days ago and no response despite receiving a confirmation email with a reference code. I would advise to stay away; as Builders seems to be *****ulent in their dealings with clients, and staff hide behind vague statements and are their solely to buffer issues and not resolve it.