anyone else ever had their bank card shut down for nothing

ive been using the same bank for yrs, theres been about 3 or 4 times when they shut my card down when i was the only one using it, i have a debit card, i usually dont use cash and just use a debit card unless i have to get quarters for laundry, yesterday when i was going thru my emails i saw something on my emails that i wanted to buy, it was a massager thing that helps with foot pain so i thought it might help me, i did the online stuff where i gave my debit card number to them to pay for it, then after i finished what i was doing it said it got declined. i called the bank up after i saw something on my phone from the bank about the usual message about it being declined, they shut my card down just cause ive never bought anything from them before, i told them it was me and not someone using my card, they unblocked it so i went and did it again so i could order it, ive complained to my bank before cause of it. i thought they stopped doing it cause it hasnt happened in a while but now it happened again, i hate to think what if i go out to eat and it gets declined for something i didnt know about cause i wasnt home, i wouldnt want to get in trouble for not being able to pay for it. anything i can do to put a stop to it or do i have to use cash now all the time to stop them from doing that. ive thought of switching banks but i heard it happens to people in other banks too, any suggestions? i hate when they do it for nothing, i told them to leave a note saying im the only one using my card, do i have to use checks everywhere? yrs ago someone did take $1000 out of my bank acct and i told the bank and they gave me the money back while they investigated it but i never found out who did it. im not stupid, i check my statements online every day , if i see something that shouldnt be there i would call them but its mean for them to shut it down when im not doing anything wrong, its not like i was buying drugs or anything with it. so how to stop this?