Spayed cat in heat

[thegame2k0]

Hi i had my beautiful 18 month calico cat spayed back in August 2020 at a vet recommended by cats protection however she has gone into heat twice since once at end of September 2020 and again started on Monday 9th November 2020, i doubt i'd be able to afford the surgery for Ovarian Remnant Syndrome if that's the case as it'll cost over £500 in total including blood tests.
Some people i spoke to did say their cats had one or two heat cycles after spaying the the cycles stopped, i'm getting complaints of neighbours about the yowling these walls are quite thin.
So really need advice please first is it true what i've been told about the one or two cycles after spaying?
Second if surgery is needed can i get help or pay in instalments?
Also should the vet cover costs as is it their error?

Cats protection did give me a voucher to get her spayed so another option is contacting them but i really don't want to bug them as they have enough to deal with in these times.
Many thanks in advance for any tips/help etc.

[Mollycat]

Some friends of mine have just been through this with their large breed and much older dog. The vets kept insisting it was normal for her to come back into heat. Eventually the mistake was proved and has now been put right. There was something about the scan showing that it was a mistake and not some extra ovary material, to finalise who had to pay for it.

But if you can't afford it and it should have been done and has not been done right, you can't feel guilty about insisting they put it right. There are health risks for unmated unspayed girls, and in the end it's her wellbeing that matters.

[thegame2k0]

Thankyou Mollycat i appreciate you taking the time to reply, atm vet is only doing urgent surgery due to lockdown told to ride this heat out and if she has a third heat then book her in for blood tests.