I just purchased less than a week ago two 7970 cards and found the same thing with them. Anyone buying used AMD cards should ask if this is what they will receive and the sellers should note this in the description.
I have 4 A10 APU's with boards ram and psu's if they wouldnt be to late. I also have some i7 950's sitting here if they would be of any help. Do you guys need PSU?
Would a range extender maybe work for you? Not sure how well it would work in your situation, I've used them in the past and in some cases have had really good results. Just an idea...
I must say I agree with everything said here... Hope this gets worked out and I think it will with alittle more time given to the OP and MSI to sort this out. Im a fan of MSI so I hope things get sorted out for the OP.
Could you use a range extender to connect to the existing WiFi that is being shared and then it will re-broadcast the connection in your apartment as your own WiFi connection separate from the shared WiFi in your building.
This would give you control of the WiFi connection you would be using...