Thank you everyone for all your suggestions and I will certainly refer back here if I need to (hopefully I won't need to

).
So far so good. We had an ant free night last night...lol. I still don't know where they got in but they have all been cleaned out of the wardrobe and of course, from under our mattress. I still have to check everything in the spare rooms but so far haven't seen any suggestions of any activity in those rooms..but I will check. Hubby has sprayed all around the house again now and we did buy some baits and will put those where and when we see ant trails. Hopefully it's the end of our problems with them. I check several times during the day to make sure they're not coming back again...lol.
Sheila...unfortunately we are stuck with the mattress...lol. It's just a new one and it's latex and cost us too much to just get rid of it...lol.
Wow..ants in the freezer! I would have thought the cold would have got them too.
And Judy...I'm glad to see I'm not the only one to have them in the bed..not that I wish anyone had them in their bed...lol. It's not fun, that's for sure.