The worst experience at Telkom

I recently purchased a product at Telkom and unfortunately they ordered the incorrect product due to misunderstanding. I requested that they change the contract to what I desired. They told me it will take 74 hours but it's been a month of waiting for a response and the correct contract. I can't study online because of this inconvenience. I missed a whole month of study and now I might just fail my assignments and my whole semester because of this. Thanks a lot Telkom.