Please help us with a fraud situation

We had some identity thefts situations with our credit cards and Bank
accounts all of a sudden
People using our credit cards and writing checks against our account.

How can I set up a secure internet system in my home ?

I use a wireless laptop to access the internet (Comcast cable) I
have in my home.
We have a WPA secure internet connection.

I use it to access all our bank accounts etc.
Somehow some people have managed to get both our credit card numbers
and bank account numbers and even driving license number.

Since I am not a techie, pls help me with as much detail as possible.

Thanks in advance

Irfan Smith

TWO LIVES, ONE SOCIAL SECURITY NUMBER

May 27

by Bob Sullivan

http://redtape.msnbc.com/2008/05/two-lives-one-1.html

Read the (almost 1700 as I write) comments of the seething American
readers of the article!

I called their main office back in December and had a leak fixed
(supposedly)
at the beginning of the year. They had their Tampa franchise come out
and do
the work. Unfortunately I had to spend the first two months of the
year in
Atlanta and when coming home mid February I saw that the pool was
still
leaking.

I called the company and spoke with management and they said they
would
be glad to come out when I wanted them too. I asked if it was okay if
I put
it off for a few months and the owner said no problem. Three months
later
its May and I call them up to come do the work and I'm told that the
franchise
had been sold and that they would no longer honor the prior owners
agreement.