Purchased Acct. Nov.2025 - Have spent 7+ hours with several case Numbers, still not able to use microsoft

I purchased back in 2025, have different case numbers, 6863247015, 7095945273, 7096322680 are some. The first thing they say is we will fix this. First person went into my computer and did a bunch and said that because I wasn't able to get into microsoft they were going to delete plan I had purchased and insert a new one , we had been on the phone for 2 1/2 - 3 hours and she had to get approval from her boss and call me back (got my number) waited a week, no call back. Called again, and about the same turn out except we got disconnected and he never called back. My work is so backlogged. I NEED HELP

PLEASE SOMEONE ASSIST ME