DriverUpdate SlimClearner Plus unresponsive; purchase not clear; doesn't work; reference to Microsoft Internet

I am not very good on computers, but read that a DriverUpdate program was "good" in connection with Windows 10.  I purchased DriverUpdate because of what I thought was an association with Microsoft.  I purchased from ClickBank and received a notice about the time to register was expiring.  I contacted ClickBank who sent an email to DriverUpdate that I hadn't gotten the registration number.  I got it and registered and after downloading found it ran and ran and ran before uploading 4 drivers (supposedly).  I contacted them when I kept getting ads to buy SlimCleaner Plus because I had so much that needed to be cleaned.  When I saw that if I HAD bought it first I could have gotten DriverUpdate much cheaper.  I complained and was referred to a live "chat".  I got Jake who said my purchase was over 60 days and I couldn't cancel and repurchased as earlier email had indicated.  I asked for a supervisor or a phone number to talk to someone.   That's when he offered to have tech logi  remotely to fix problem but that I couldn't cancel and rebuy as earlier indicated.  There is no web address given (or I just don't know how to locate) and only a PO Box to write to.  I will be taking my PC to real live computer person to delete all.  I am so tired of being ripped off concerning computers when we are being "forced" to do everything online and yet how are older people suppose to learn all this stuff?