Early cancellation of contract

I request for early cancellation for my contract on the 12/04/25 and thy sent it I paid the full amount at Brooklyn store and add this month instalment. And i sent the proof of payment,I’d and the signed document. The whole week I have been call Vodacom call centre to check how far is the process, thy always says is in progress. And now they blocked my no I can’t call their customer care, I need to borrow phone to call them and do follow up . All I want is a paidup letter to show that I no longer owe you Vodacom service is poor I will never recommend it or take contract ever again