Rain just debits your account even though you cancel

Well when I got the Rain sim card it was all good paid the R479.00 i think it was got verified this was done the 10 of January 2021 we bought it because our ADSL box was ****** and Telkom needed to fit a new one, so we got Rain so we could have internet. My daughter cancelled before the 10 of February 2021 they deduct R345.00 from her bank accounts when i email them back to ask if they charged me that they send me the account again which does not explain to me why they charged me when it was canceled it was pointless because to use i had to go sit near a tower to get signal. There is no signal at home to even watch Netflix