They have tried to call me three times, but they never leave a message and my phone says "reported as telemarketer" when they ring. If you try to call it back it says the number is disconnected.

Same thing. ResortClub pests. Won’t stop calling.

Caller: Holiday resort club

Not interested

100% agree to this exact same situation I'm having now.

Called me on this number however, didn't answer. Didn't leave any voice message. I tried calling back but it's disconnected.

Hung up when I answered. Called back - number is disconnected.

Caller: The Resort Club

I've been with Resort club for 15yrs and have only had one holiday with them and have accumulated for much credit with them, but they continually call me at least 2 a month to see tell me about the new membership and to combine all credits to get bonus credits that I can use to the full instead of my own money. This is only offered to members on a Wednesday and very limited offers for locations and dates... it's like a Hot deal sale on the one day and often the stay period is for that month mid-week. Anyway, I constantly tell them to stop calling as I already have it all and to take me off the call list... but then it does its rounds again... it's doing my head, very call fatigued by these guys!!!

Caller: Resort Club

Probably The Resort Club. I had a holiday with them once, over 20 years ago and they still harangue me with cold calls

SCAM.
If it's not, then leave a bloody message or answer when I'm calling back.

Caller: I don’t know

Called back and it says the number is not connected