Interest money

Q: Please advise the best ways (most recommended ways) to spend/dispose of interest money earned from a bank savings account?

Q: I have had some interest money which I gave to a paraplegic in a wheelchair at our local mosque. I didn’t tell him it was interest. I did not expect any sawaab for this. He made so much of dua for me and I kept saying آمين. 

Is his dua acceptable and is my saying آمين acceptable.

Q: Previously I should donate any interest accrued monthly. 

My father said I rather keep it because he will be buying a big property within a year or two, and we can use the interest for paying the property taxes, municipal rates, etc. which are exorbitant. 

Would this be okay - to withhold the interest for sometime with the intention of paying taxes?

Q: Can I use interest from the bank to pay for my grand kids dentistry? Their mother is single and there's no medical aid.

Q: 

1. Is it permissible to dispose of interest monies to ones helper? 

2. What are some recommended ways to dispose of interest money?

Q: Is it permissible to pay interest fees with the interest received, from and to the same party. 

E.g. A bank rewards its client with an interest % for utilising a savings account. On the other hand, the same bank charges the client an interest fee for using its credit card facility. Can the client pay the latter with the interest received? As it will be returning the same interest to the bank.

Q: I have a helper whom I pay on a monthly basis. For 1 month I was not at home so she did not come to work. However I will still pay her wages at the end of the month. Is it permissible to pay these wages with interest money as she has not worked the whole month?

Q: Can interest money acquired from one bank be used to offset interest charges on my credit card from another bank, or is it only permissible to use the interest money of one bank to offset the interest charges of the same bank?

Q: I have a credit card loan which I need to pay immediately. For several months I am trying to pay it but I failed. I don't have sufficient money to pay it. But I have a bank deposit from where interest money is automatically generated. I have no other source to pay it other than this interest money.

Previously I did not use this interest money due to Islamic reasons. But now I am in an emergency situation as if I fail to pay my debt, it will generate interest. Kindly help me and show me the correct path. May I use this interest money to pay my debt and seek forgiveness to the Almighty Allah?

Q: A person has two saving accounts with different banks. One account accumulates interest, the other does not. Is it necessary to discharge this interest from this very account, or can it be given through other means (payment from the second account or cash)?