Debited without authority

In June I app**** for fibre service, but didn't get feedback, as they wanted 1k to initiate the process, so I didn't pay that. Thinking that the process will be canceled. On 23 August I got a call from a driver saying they will deliver the router , I declined because I assumed that my application wasn't gone through . I contacted mweb and requested them to cancel. On 24 August my account was debited for 288, and on 31 Aug 847.50. I didn't take the router , I'm not using the service provider and I sent an email to cancel. Ref number mwb ***3, customer number ***7 ,this is really pathetic service. Mweb has no authority to debit my account seeing as they are not my service providers and I have not given permission for my account to be debited. Pathetic service and I would never recommend them to anyone