Do you have any confirmation of the purchase? either an email or a message in the 'Messages' tab on your account?
If you don't have any confirmation: the purchase failed and your money would be returned.
If you do have a confirmation: check it to see what type of Bond you bought (RS3 or OSRS) and also check to see the name of the account it was bought for.
Confirmation messages always state the name of the Bond and the display name of the account that purchased.
Bonds for each game version are named differently: RuneScape Bond - Old School Bond
Depending on what payment method you used, it can take up to 24 hours to receive the purchase however, six days is way too long.
It means either you are checking the wrong account, checking the wrong game version or the purchase failed.