Blocked from making actions on my account

Last week I deleted instagram for a week and hadn't been active on it at all, when I redownloaded and went back onto my account it said that I was blocked from doing anything for another week. after the block was over I liked about 3 posts and I was told that my account had been blocked again. It's because they suspected that I was using an app to like lots of pictures in order to get likes and follows but I have never used one of those apps and I definitely haven't liked enough posts to make it seem suspicious. Has anyone had this problem? And if so does anyone know what I can do