Blasphemous Waswas & Fear of Kufr

Salam aleykum. Around 3 days before Ramadan i started getting waswas. It was so sudden and i couldn't do anything about it. That day i committed a sin and it was during that moment i remembered that what i was doing was wrong. That remembrance of Allah then turned into this waswas. And It has continued since then and it is also affecting me in Ramadan. For context i have suffered from waswas before but it was always of one kind and i was talked out of it. Since then it has been in waves, it comes and goes but i manage. My issue is that it has been affecting my mood in ramadan so much and has made me feel so guilty. Different from other times, this waswas has only been insults towards Allah and blasphemous imagery in my mind. The more i fight it the worse it gets. I am so disgusted by it and feel extremely guilty, i can't stop thinking about it's consequences and can barely seek help due to my location. I am also extremely unwilling to talk about these evil thoughts to someone face to face as i am disgusted by them. I don't understand why or what to do. I feel like my mind has been tainted and I don't know what to do. I also don't know why i keep having these thoughts if the shaytan are chained this month. I feel like i will never recover from it and can't seem to fight the thoughts. It keeps reappearing in different forms and it's extremely tiring. Praying and reading Quran has given me the peace of mind and has helped but the thoughts are ultimately still there lurking and feel like a stain. What should i do, these thoughts are so shirk and i feel so guilty and uneasy for even having them? The more i fight them the more they fight back and i am unsure if i have commited kufr. -Short update after eid has passed as this was written during the first half or ramadhan: the evil thoughts have become a bit weaker and i have become better at handling them but my worries are still there.