Fixed Deposit fiasco

Phone to enquire about a fixed deposit on 31 August we were given a great rates and and extra .25% because my mom is a pensioner and lives off this money. We both spoke to different consulants and when we enquired how long the interest rates are valid for we were told until mid September. It took a few days to get the account opened and not a few minutes as they claimed. i tried to open the fixed deposit account on the 2.9.2020 but the interest rates are no longer valid and the extra .25% is also not applicable anymore after she moved all the money across from ABSA. Phone this morning and i was told sorry for you but it was for a limited time and maybe the other consultants were not aware of it.....very poor service and experiernce from Discrovery definety not what i expected!!