how can i cancel this?
i just get this same when i put email and last 4 numbers of my card Incorrect order number and/or password.
Not sure what you mean, post a screenshot.
It is either oder number + password or email address + the last 5 digits of your credit card.
i have try the tow like 10 times will not work
Best you submit a ticket: https://support.avast.com/Tickets/Submit
its ok i got it thanks for your help tho 
You’re welcome.
nope i got on but when i try to change it it comes up with put email and password in when i put in it comes up with Enter a valid email address. i try to send ticket but comes up with enter a valid email. can i just cancel with bank be cos im sick of trying!
Ofcourse you need to provide a valid email address if you want to submit a ticket.
How else do you expect avast can answer the ticket?
thats just it it is valid im not stupid i have 1 email
i can not change if i can not get in there if the money go out my bank i will wont a refund but haw can i do that if i cant send a ticket!! with the email that i give you last time i payed and registered with ?
Try the same email as you are using here.
i did but it dint work pleas help me
Please send me your email in private to have a look at it.
Perhaps I see why it (possibly) isn’t working.
I’m having the same issue. When I attempt to log in to Manage Subscription, It say’s to enter a valid email address. All of my information works fine on the main Avast site.
sent Eddy thanks
Why are you trying to login when there is no need to do so to submit a ticket?
ps:
your email is working if you just want to submit a ticket.
I had the problems as everyone on here. I want to cancel my subscription as Avast is problematic on Windows 10.
Nexway do not recognise my email address when I try to log in and the links provided here do not work. 404 errors
I have just cancelled the direct debit with my credit card company and asked them to investigate Avast/Nexway for fraud.
Stitch that…