How long to hear back after job interview?

So I applied for a job at Travel Money and had my interview on the 18th of last month. I didn't hear anything for a while; I assumed there must be delays due to Christmas and New year. Just before New year I rang up the hiring manager to ask whether any decisions were made, I was told that interviews are still being done as some people rescheduled and that I should get a decision by the 5th. After not hearing anything I rang again on the 7th and the manager did not answer, so I sent them a text just letting them know that I am excited for the opportunity and whether there were any updates to my application. I have been left on read since then. I was hopeful of getting this job as I have previous experience in Sainbsurys as a christmas temp.
If (as told by the manager) a decision was made on the 5th, surely I should've got the automated rejection email by now or are Sainsburys just really slow. Is being ghosted a 'polite' way of rejecting or is there still a small chance of getting the job?
I have applied for countless part time retail jobs and had no success, this was the first job that I actually received an invite for an interview the others were straights rejects or being ghosted. Being unemployed for so long is causing me so much distress. I thought of going with an agency until i find a proper job but they only offer 12hr shifts which are mostly nightshifts. The job centre are useless. I dont know what to do anymore
Any advice guys plsss?