I want to return to my old place of work, but I’m ashamed

I worked in one place for about a year. I liked everything. Managers always help, provide professional support, and always teach something. This is a big plus for me. They hired me at that moment with no experience at all. Thanks to them, I became confident in my work, but by the end of the year my colleague quit and my work doubled. But she still managed to do it and didn’t whine. I was hoping that my salary would increase. But no, on the contrary, I worked for free for the last month and a half.

Having completed the tasks on time, I announced that I was quitting. They responded by saying that there are still tasks that need to be completed in a couple of days, and they will issue salaries for this month and a half. But I had no desire to continue working, and I had no strength. She was completely tired (she also hinted to them that she was tired). She couldn’t answer and just silently left the office. The next day I didn’t go to work and the next day I missed a couple of calls (I’m thinking about a task that needed to be completed in a couple of days, since documents for this task arrived at the same time). But I never called back, test-antibiotic.com and they are also silent.

Almost a month passed like this. Stayed at home. And a couple of days ago I found the same job. They offered me double salary. I've only been working here for a couple of days now. Everything seems fine. The management is excellent. But here you need to work a little more independently, but there is also support. But now I have a great desire to return to the old place (I’m sure they will take it back). Why? Because I work there confidently, there is always support and control. There is no fear that I will do something wrong. Please tell me what should I do?