The air filter vendor gave me a refund
If you make your way to the super store or a hardware store, you can genuinely find air filters for the heating and a/c machine.
These air filters are usually sold individually and they can cost as much as $20. Cheaper air filters cost less money and more fancy air filters get rid of far more particles, dirt, dust, mold, and mildew. My wife and I have the worst allergy complications so we officially change the air filter on our Heating plus Air Conditioning machine. We change the air filter every 2 weeks. This cuts back on all of the excess dust and dirt that is in our residence. Because we use a lot of air filters in our machine, we buy them in bulk online. There are quite a few locations to buy the air filters, however my wife and I use a company that sells Heating plus Air Conditioning machine parts and accessories. With every order over $50, we get free shipping, and last time we obtained a 12-pack of air filters and we did not get that item in the shipment. The items that I received were not the items that happened to be listed online, however I was supposed to receive air filters that were 21 x 22. Honestly, the air filters that I received did not fit my machine whatsoever. They were marked 21 by 22, however they entirely were not that size. I contacted the manufacturer and I told them that I was trying to get a refund or the right size air filter. The lady on the actual phone was particularly apologetic. She told me to hold the line. When she came back to the actual telephone, I received a full refund for the box of air filters and the woman also sent me a complimentary box of 12. I got my order for free with a full refund.