Worst Warranty Claim I have ever had to deal with.

I requested a return on the 11 April for a faulty product. I thought to save time I will only ask for the hard drive to be replace from a full cctv combo. they then tell me I need to take everything off to do this. between 18 april when they requested I send everything back. After I told them it is just the harddrive, I then paid someone to take off all the cameras as per the request. in between I sent pic to tell them cant they just replace the harddrive the rest is working. I then send in all the cameras and dvr / power supply. Only then after everything is taken off do they respond like 8 days later to say the merchant will replace the harddrive. I then told them they need to either pay for the invoice that I had to pay to uninstall. in the mean time because the lack of communication I ordered a different camera set to get installed because I would have off with no cameras for around 40 days. Yesterday the 23 may I received a box with the harddrive while the whole cctv system is at takealot. I told them that as per the warranty I have the option to return it all and to credit my account. I get ingnored via email and have asked numerous times for a manager or someone who can talk to please call me. I need to explain this to someone. they forced me to uninstall the product for this claim. they just wasted my time and the response from them are days apart.