Monginis Cake — bad cake

7th march 2019 at night i bought a monginis black forest cake from sangvi, pimple gurav, pune, maharashtra, india. It was the last black forest cake left in that store.
8th march 2019 morning i took out the cake from refrigerator and then after sometime i cut it as it was my birthday and the first piece i ate i literally made a vomit face cause it tasted weird n then when other 3 members of my family ate the same cake they started telling me it tasted weird and extra extra sweet.
I often buy cakes and its always from monginis... Because i love cakes from monginis especially black forest.. But this time it was a very bad experience and also it was shocking as to how cheap it tasted... My birthday ruined cause of the taste of this cake.
I also went to that monginis store and told them this and they took the half cake which was left and took my complaint about it.
They said the cake will be tested by company and then i will be informed.
The reason behind writing this email complaint was that 1. I always buy cake from monginis only its many years since i buy cakes from monginis. The rich quality of monginis cakes that i have had was rich and fresh and balanced and amazing but this time i really felt bad as to how my money was wasted on a weird tasting cake... I feel cheated seriously.. Also this cake i used to buy at rs.350 to rs.380 where as this time it was for rs.300.. They said the prices have been reduced... I wanna ask that where prices were reduced so the quality of cake is reduced?.. The cake tasted weird seriously and it felt low quality.
2. All i want is honest feedback after the testing of the cake. I've always bought cakes from monginis but this all my trust and love for monginis was gone in a minute.
The above is the email i sent to them and got no reply from them
N the store also replied me today 11th march when i called them n said that the company said there was no problem in the cake and that i won't be refunded.
The customer care of monginis but they are not picking up the call. Very bad experience i feel completely cheated and want justice.