Staples They did not "fix" issue slowing down computer; yet told me they did. Wyomissing Pennsylvania

HP desktop Slimline PC-270-p0xx, product # Z5L82AA#ABA, was not able to update, which in turn slowed the computer down. This is an older computer ( 4/2018) ATT I was ready to purchase a new tower. I spoke to sales assoc and agreed to a free PC tune-up. I left my computer with them on March 4, 2023 expecting to hear back in 24 hours. The computer was not ready until March 7. Upon pickup I was told all problems had been resolved and updates would go through. When I restarted my computer, the same thing occurred: system would not boot up, and when it did, kept displaying the same message "Computer will not update, no changes have been made to your computer. After 2 hours, it finally went to the home screen. To date, this computer has not been able to install any updates. I called and spoke to head of tech department. He was very rude and condescending and began to raise his voice. I spoke to other employees who said I should bring it into the store and they will manually force the updates. I can’t take my computer to Staples on a continuous basis. I was not informed when I picked up my computer that the update problem had not been resolved. When I spoke to one employee, over the phone, he told me I should have been told this. That this problem is on Microsoft’s end. Yes, they installed a virus protection program. I could have easily installed McAfee by myself. I would also have preferred to pay that money towards a new computer. When I asked about a refund on this service to be applied to a new computer, I was told that was impossible. So I knew this was their stance when I began contacting corporate office. Since then I have contacted Staples with an email describing all of the above 3/25, and 3/29. I have only received generic responses. I mailed my letter and attachments on 4/8. No response. I have called corporate off on4/19 and told then and 2 other phone calls, they would get back to me by end of working day…..no response until the third received a short email saying store would not issue refund followed by the response we are happy when customers offer us the opportunity to correct a situation and regain customer satisfaction. Another condescending, useless response which indicates their lack of truly investigating my issue. They should have given me credit towards a new PC which I initially wanted to do but was strong armed into buying their service plan.