complaint

I went to Vodacom Fourways mall to apply for contract phone, Huawei P Smart 2021. and i was told that I was told that i do not qualify for that phone but Oppo. Within few days I went to another Vodacom in the same mall and they told me I do qualify for the P Smart so i need to go to that Vodacom and ask for the manager so that they can sort this. but when i went back the manager told me that i signed the contract so that mean i was in that agreement with the sales person and he didnt even take it into consideration that i was misled by his employees and because of i was desperate i took the Oppo Phone. the manager didnt even ask me for the entire story , all he did was to sell this Oppo Phone to me.