Bad service with Home Internet cancellation

I took up a hope router connection with Vodacom that arrived on 07 June 2024. After realizing that the speed is not what what advertised I arranged that it be picked up . I'd spoken to a Kagiso on 18 June who confirmed that I was still in the contract cooling period, and that I must call in 3 days after Vodacom has confirmed receipt of the device. on 25 June I called to check if it has been cancelled , and had been given the Sequence number *** and that the case was being handled by Ayanda Khumalo who would be in contact with me and that the request should be attended to by 28 June 2024. I received a debit order of R837 from Vodacom for a modem that is no longer in my possession , and it barely used 1 Gig of data due to the 1Mbps speed it was giving me. Today on 04 June 2024 I called Vodacom customer care to make a query, only to not pass through to the option beyond entering the cellphone number (because the number in question *** was not being recognized by the database). I double check the link to I was given to check progress on the query to cancel the contract- there is no trace of it under completed nor in progress. I'd like to request a full refund of the funds in question as soon as possible. Further communication can be extended to me to my email address at ***