We bought the pay AVG and it doesn't work

Hello Ross,
We apologize for the difficulties you are currently experiencing.
Upon carefully reviewing your account, I see that you have purchased AVG PC TuneUp product. To install it in your pc click on the following link http://files-download.avg.com/inst/mp/AVG_PCTuneUp_765.exe download and install the application. If you still face any issue with it feel free to contact us for any further assistance.
Feel free to contact us for any further assistance. Thank you.

We paid for the AVG and it doesn't work.
How do we get a refund?
This is the second time.

It just plain and simple doesn't work.

Hello Ross,
We apologize for the difficulties you are currently experiencing.
Upon carefully reviewing your account, I see that you have purchased AVG PC TuneUp product. To install it in your pc click on the following link http://files-download.avg.com/inst/mp/AVG_PCTuneUp_765.exe download and install the application. If you still face any issue with it feel free to contact us for any further assistance.
Feel free to contact us for any further assistance. Thank you.