avast free help some one please !!!

Hi ,I left my card details in case I wanted to keep the avast higher cost programme .I have said on here that I do not want it ,and I’m still running the free version. Have gone back to free for some time. Now in my email ac it says I have now got the full version ,thank you for your money etc !!! I have been on free again some time and I’m totally happy with it.
I cannot afford this ! Have just paid mega ££££ on Vets for one of my animals . Please I am so upset ,my husband’s going to freak when he checks our bank a/c online. Please can anyone help me??

https://www.avast.com/faq.php?article=AVKB24#artTitle (Orders and Renewals)