The fact that you appear to have plenty of equity in the property doesn't detract from the fact that you have little income, and yet you have been spending well above your level. Your credit rating is poor, because you clearly cannot manage your finances, and you really expect a mortgage company to take you seriously?
Your 'release some equity' plan just means you want to increase the debt on your property, to clear other debt! Unfortunately your husband has no income except his pension to support a higher morgage repayment plan. I suggest that if you are no longer able to pay your debts, because you cannot control your spending, then you need to visit your local CAB.