FNB ALLOWING ***** FROM AN ACCOUNT WITH INSUFFICIENT FUNDS!!!!

An online puchase was successful from an account with insufficient funds, YOUR OWN BANK promoting ***** simply because its an auto system which allowed the ********** transaction to go through based on my good account record. i cancelled a contaract i had with WEBAFRICA and webafrica responded confirming cancellation of the contract and they sent an email with this wording in RED "Please Note: Due to the National Lockdown, over the outbreak of Covid-19, we request that if you have cancelled a Fibre/LTE service and need to return your free-to-use router that you keep it for now until further notice. NO router penalties will be charged to your account. Keep it safe, but keep yourself safer. This was sent in June and no futher communication from WEBAFRICA, 31st of August 2020 they debited my account for the router which i do not even want, guess how much it was R1999 and GUESS what my own bank FNB did?????? allowed this transaction to go through on an account with a balance of R200, i never signed up for an overdraft, i contacted their dispute department and its 7days now and my account is still in negative . i even forwarded the email WEBAFRICA sent to me to hold on to the router until further notice but my own bank is not even supporting me. FNB you SUCK ,poor customer service, **** system you have that allows for a debit i did not authorise to go through from an account WITH INSUFFICIENT FUNDS!!!!!!!! Its EXTREMELY SHOCKING. YOUR OWN BANK ALLOWING *****.