Cancelation of contract

I attend a presentation of VHI. Was blown away by their presentation. Could not pay the full deposito as required. did sighn the contract. Was told if I do not pay the deposito the contract are not valled. I could not pay the full deposito. Call them the next day to cancel my contract. Spoken to Elsabe. She said she will cancel my contract.When I follow up a week later she said I must cancel in wrighting. I then send a E mail on the 7th September. She then told me it is to late as I should have done it within 5 working days.I spoken to her in person one day after I sighn the contract and she keep me hanging till the 5 day expire. I have sent more that 6 mail to VHI to cancel my account . WHAT NOW My wifes company Rethuseng in Middelburg are bankcrupt and she has not her salary for March and there is no hope for a Salary in April PLEASE PETER HELP