Hello Izzi and welcome back.
Well done on three weeks gamble free. During your previous gamble free time what support were you using? What support can you use now? What barriers can you put in place? It sounds like you had access to first a couple of thousand and then a lot of credit , too much access for a compulsive gambler.
Who close to you have you told about your gambling and your debts? Trying to keep things hidden can in itself send someone gambling.
You managed 7 months gamble free before and you can do it again. This time though keep using support to maintain recovery.
keep posting