I agree with the above
You do not say why you cannot fix the puncture yourself - is this a knowledge problem, tool problem or a physical problem
if possible get a puncture repair kit and some tyre levers and , if necessary a spanner that fits the wheel nuts - or better still a socket set and a set of Allen keys for the whole damn bike!!! Don;t bother with expensive stuff - just something cheap from a DIY store
Then follow a YouTube video - or a set of instructions - and work out how to fix it yourself - if that is possible
Then replace the tyre with Marathon Plus - and get new inner-tubes with sealant in them - although this will probably stop the problem for a while
However, I would recommend taking the tyre off every so often and checking for thorns and stuff because the best puncture resistant system and sealant will always have trouble with one of the thorns of bits of mets (probably from car/van/lorry tyres) that is embedded in the outer tyre and gets pushed inwards on every revolution of the wheel
Last time I did that I removed 7 thorns and 2 slivers of metal
Good post.
Over the years, I have occasionally heard from friends with similar findings of thorns, not just myself or you, so it may be even more common that I thought when I previously posted...the bike shop he used appears to not check carefully enough for such things.
But having myself made exactly the same mistake, I cannot blame them entirely......
But its certainly something that needs careful checking, if shortly after a puncture, another one happens, especially if its about the same distance AWAY from the valve, even if NOT close to the previous puncture! (Think about it, was everything put back with the same orientation or not?)
Puncture position should be carefully noted as one gets on with the job at the point of the 2nd and subsequent punctures.
The usage of an old tyre cover as an extra "barrier" works really well with thorns, and is cheap and easy. Probably not so effective with metal spikes!
My current bike has big (not fat, but fairly close to) knobbly (loud!) tyres, and up to now has not had a puncture, simply due I feel to the depth of the rubber, but I would still expect a thorn or two, but (surmising only) they probably break/wear off, before fully penetrating to the tube....Just a thought!
Regards
Andy